feat: named live books; start selected_2026_09 (26 strategies)

A live book is a cohort of strategies, each with its own account, started
on one date with one capital and a flat fee per order (trader.LIVE_BOOKS).
The original book keeps its state in data/; a named book in
data/books/<book>/. The monitor runs every book; auto/status/log/compare/
replay take --book. A fresh account opens on the book's first session.

selected_2026_09: US $10,000 and $1 per order from 2026-09-25, CN ¥50,000
and ¥5 per order from 2026-09-28 (the first CN session after the choice).
Strategies beat their benchmark in the Apr-Sep 2026 point-in-time replay
and passed a 10-year PIT backtest (US Sharpe >= 0.6, MaxDD > -50%; CN
Sharpe >= 0.2, CAGR > 0), no daily variants, at most two frequencies per
factor signal, plus the three 2026-09 research strategies.

bridge.py live --book and bridge.py books feed a book selector on the
live page (/api/strategies/live?book=, /api/strategies/live/books).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -36,6 +36,7 @@ uv run python trader.py status  --market us --strategy recovery_mom_top10  # Por
 uv run python trader.py simulate --market us --strategy recovery_mom_top10 --start 2026-01-01 --end 2026-04-01  # Historical replay
 uv run python trader.py log --market us --strategy sim_recovery_mom_top10 --start 2026-03-01  # View daily log
 uv run python trader.py simulate --integer-shares --fixed-fee 2.0 ...    # Integer shares mode
+uv run python trader.py compare --market us --book selected_2026_09      # A named live book
 
 # Precompute the strategy page's backtests (writes data/precomputed/)
 uv run python precompute_backtest.py
@@ -72,6 +73,8 @@ uv run python -m unittest discover tests
 
 **Daily trader** (`trader.py`): Live/forward-testing system with persistent portfolio state in `data/trader_{market}_{strategy}.json`. The `auto` subcommand runs both signal generation and execution in a single invocation — designed for cron. The `simulate` subcommand replays a date range day-by-day with realistic portfolio tracking (fractional shares, cash, commissions). Orders: whole A-share lots are allocated nearest-lot within cash (`_allocate_lots`); a held name is resized only when ≥ `RESIZE_BAND` (10%) off target. Available strategies: `recovery_mom_top10`, `recovery_mom_top20`, `momentum`, `momentum_quality`, `dual_momentum`, `inverse_vol`, `trend_following`, `buy_and_hold`, 32 factor-combo strategies (`fc_{signal}_{freq}` — see `strategies/factor_combo.py`), and the robust-momentum bar strategies `overnight_recovery_top10`, `lowrisk_momentum_top15`, `lowbeta_sharpe_mom_top20`.
 
+**Live books** (`trader.LIVE_BOOKS`): a book is a cohort of strategies, each with its own account, started on one date with one capital and a flat fee per order. The original book (every live strategy, `MONITOR_CAPITAL`, `MARKET_FEES`) keeps state in `data/trader_*.json`; a named book keeps it in `data/books/<book>/`. The monitor runs every book; `auto`/`status`/`log`/`compare`/`replay` and `bridge.py live` take `--book`, and `bridge.py books` lists them for the UI's book selector. `selected_2026_09` (26 strategies, US $10,000 / CN ¥50,000, $1 / ¥5 per order) starts on 2026-09-25 (US) and 2026-09-28 (CN).
+
 **Strategy protocol** (`strategies/base.py`): All strategies inherit from `Strategy` ABC and implement `generate_signals(data) → DataFrame` where the returned DataFrame contains portfolio weights (rows = dates, columns = assets, values sum to ~1.0 per row). Each strategy is responsible for applying its own 1-day lag via `.shift(1)` to avoid lookahead bias — the backtest engine does not shift. A `BarStrategy` declares `fields` (close/open/high/low/volume) and receives `{field: DataFrame}`; live it uses completed bars only (row d from bars through d-1, traded at the close of d), while close-price strategies read the session's open as their latest price.
 
 **Strategies**:

bridge.py

@@ -23,9 +23,13 @@ import metrics
 from backtest_runner import benchmark_curve, run_market
 from research.permanent_yearly import equity_with_cashflows
 from trader import (
+    LIVE_BOOKS,
     LIVE_EXCLUDED_STRATEGIES,
     MARKET_FEE_TIERED,
+    MONITOR_CAPITAL,
     STRATEGY_REGISTRY,
+    book_dir,
+    book_strategies,
     convert_quote_currency,
     strategy_data_market,
     strategy_supports_market,
@@ -863,8 +867,10 @@ def cmd_live(args: argparse.Namespace) -> None:
     """
     market = args.market
     prefix = f"trader_{market}_"
-    state_files = sorted(glob(os.path.join("data", f"{prefix}*.json")))
+    book = args.book or None
+    state_files = sorted(glob(os.path.join(book_dir(book), f"{prefix}*.json")))
     wanted = args.strategy
+    in_book = set(book_strategies(book, market)) if book else None
 
     panels = _load_panels({market, "etfs"})
     bench_ticker, bench_label = LIVE_BENCHMARK[market]
@@ -885,6 +891,9 @@ def cmd_live(args: argparse.Namespace) -> None:
         if strategy_name in LIVE_EXCLUDED_STRATEGIES or not strategy_supports_market(strategy_name, market):
             _log(f"  Skipping {strategy_name}: not a live strategy in the {market.upper()} book")
             continue
+        if in_book is not None and strategy_name not in in_book:
+            _log(f"  Skipping {strategy_name}: no longer in book {book}")
+            continue
 
         try:
             with open(path) as f:
@@ -1018,6 +1027,18 @@ def cmd_live(args: argparse.Namespace) -> None:
     json.dump(_sanitize_for_json(results), sys.stdout, default=str)
 
 
+def cmd_books() -> None:
+    """Live books: the original book first, then the named ones (newest last)."""
+    books = [{"id": "", "label": "全部策略（2026-04 起回放）", "startDate": None,
+              "capital": MONITOR_CAPITAL, "feePerOrder": None,
+              "strategies": {m: book_strategies(None, m) for m in ("us", "cn")}}]
+    for book_id, cfg in LIVE_BOOKS.items():
+        books.append({"id": book_id, "label": cfg["label"], "startDate": cfg["start"],
+                      "capital": cfg["capital"], "feePerOrder": cfg["fee_per_order"],
+                      "strategies": {m: book_strategies(book_id, m) for m in ("us", "cn")}})
+    json.dump(books, sys.stdout)
+
+
 # ---------------------------------------------------------------------------
 # CLI
 # ---------------------------------------------------------------------------
@@ -1043,6 +1064,11 @@ def main() -> None:
     live_parser = subparsers.add_parser("live", help="Read live trader states")
     live_parser.add_argument("--market", default="us", choices=["us", "cn"])
     live_parser.add_argument("--strategy", default=None, help="Filter to specific strategy")
+    live_parser.add_argument("--book", default="", choices=["", *LIVE_BOOKS],
+                             help="Named live book (default: the original book)")
+
+    # books
+    subparsers.add_parser("books", help="List live books")
 
     args = parser.parse_args()
 
@@ -1052,6 +1078,8 @@ def main() -> None:
         cmd_backtest(args)
     elif args.command == "live":
         cmd_live(args)
+    elif args.command == "books":
+        cmd_books()
     else:
         parser.print_help(sys.stderr)
         sys.exit(1)

tests/test_live_pipeline.py

@@ -3,6 +3,8 @@ order sizing, and how results are reported."""
 
 import unittest
 from datetime import datetime, timezone
+from types import SimpleNamespace
+from unittest import mock
 
 import numpy as np
 import pandas as pd
@@ -61,6 +63,47 @@ class PanelRefreshTests(unittest.TestCase):
         self.assertEqual(len(cleaned), 4)
 
 
+class LiveBookTests(unittest.TestCase):
+    BOOK = {"label": "test", "start": {"us": "2026-09-16"}, "capital": {"us": 5_000.0},
+            "fee_per_order": {"us": 1.0}, "strategies": {"us": ["momentum"]}}
+
+    def _run(self, state: dict):
+        close = _panel({"AAA": [10, 11, 12, 13, 14], "BBB": [20, 20, 21, 21, 22],
+                        "SPY": [1, 1, 1, 1, 1]})
+        args = SimpleNamespace(market="us", strategy="momentum", book="test", capital=None,
+                               tx_cost=0.001, fixed_fee=2.0, integer_shares=True)
+        equal = pd.DataFrame(0.5, index=close.index, columns=["AAA", "BBB"])
+        with mock.patch.dict(trader.LIVE_BOOKS, {"test": self.BOOK}), \
+                mock.patch.object(trader, "strategy_universe", lambda m, n: (["AAA", "BBB"], "SPY")), \
+                mock.patch.object(trader, "pit_candidates", lambda m, n, s: []), \
+                mock.patch.object(trader, "load_strategy_prices", lambda *a, **k: (close, close, close)), \
+                mock.patch.object(trader, "session_signals", lambda m, n, t, days, c, o: equal.loc[days]):
+            return trader._process_sessions(args, state, refresh=False)
+
+    def test_a_new_account_starts_on_the_book_date_with_its_capital_and_flat_fee(self):
+        state = self._run({})
+        self.assertEqual(min(state["daily_equity"]), "2026-09-16")
+        self.assertEqual(state["initial_capital"], 5_000.0)
+        self.assertTrue(state["trade_log"])
+        self.assertTrue(all(t["commission"] == 1.0 for t in state["trade_log"]))
+
+    def test_no_account_is_opened_before_the_book_starts(self):
+        with mock.patch.dict(self.BOOK, {"start": {"us": "2026-10-01"}}):
+            self.assertIsNone(self._run({}))
+
+    def test_book_strategies_are_live_strategies_of_their_market(self):
+        for book, cfg in trader.LIVE_BOOKS.items():
+            for market, names in cfg["strategies"].items():
+                for name in names:
+                    self.assertIn(name, trader.STRATEGY_REGISTRY, book)
+                    self.assertNotIn(name, trader.LIVE_EXCLUDED_STRATEGIES, book)
+                    self.assertTrue(trader.strategy_supports_market(name, market), (book, name))
+                self.assertEqual(len(names), len(set(names)), book)
+                pd.Timestamp(cfg["start"][market])
+                self.assertGreater(cfg["capital"][market], 0)
+                self.assertGreaterEqual(cfg["fee_per_order"][market], 0)
+
+
 class SessionAndOrderTests(unittest.TestCase):
     def test_todays_bar_is_not_a_close_until_the_session_settles(self):
         raw = _panel({"SPY": [1, 1, 1]}, start="2026-09-22")

trader.py

@@ -107,6 +107,47 @@ RESIZE_BAND = 0.10
 # Default live capital per market, in the market's own currency.
 MONITOR_CAPITAL = {"us": 10_000.0, "cn": 70_000.0}
 
+# Named live books. A book is a cohort of strategies, each trading its own
+# account from the book's start date with the book's capital and a flat fee per
+# order (no proportional cost). The original book (every registered strategy,
+# MONITOR_CAPITAL, MARKET_FEES) keeps its state files in data/; a named book
+# keeps them in data/books/<name>/. The monitor runs every book.
+LIVE_BOOKS: dict[str, dict] = {
+    "selected_2026_09": {
+        "label": "精选组合（2026-09-25 起）",
+        # CN starts with the first session after the strategies were chosen
+        # (the choice was made after the CN close of 2026-09-25).
+        "start": {"us": "2026-09-25", "cn": "2026-09-28"},
+        "capital": {"us": 10_000.0, "cn": 50_000.0},
+        "fee_per_order": {"us": 1.0, "cn": 5.0},
+        # Chosen on 2026-09-25: beat the benchmark in the Apr-Sep 2026 replay
+        # (point-in-time members) AND passed a 10-year PIT backtest (US:
+        # Sharpe >= 0.6, MaxDD > -50%; CN: Sharpe >= 0.2, CAGR > 0); no daily
+        # variants; at most two frequencies per factor signal. Plus the three
+        # strategies from the 2026-09 PIT research.
+        "strategies": {
+            "us": [
+                "fc_up_cap_quality_mom_biweekly", "fc_up_cap_quality_mom_weekly",
+                "fc_up_cap_mom_gap_biweekly", "fc_up_cap_mom_gap_weekly",
+                "fc_rec_mfilt_deep_upvol_monthly", "fc_rec_mfilt_deep_upvol_weekly",
+                "fc_down_resil_qual_mom_monthly", "fc_down_resil_qual_mom_biweekly",
+                "fc_mom7m_rec126_monthly", "fc_mom7m_rec126_biweekly",
+                "fc_rec63_mom_gap_biweekly", "fc_rec63_mom_gap_monthly",
+                "fc_ma200_mom7m_rec126_monthly", "fc_ma200_mom7m_rec126_biweekly",
+                "fc_rec_mfilt_ma200_monthly", "fc_rec_mfilt_ma200_biweekly",
+                "hybrid_alpha_top10", "recovery_mom_top10",
+                "overnight_recovery_top10",
+            ],
+            "cn": [
+                "fc_up_cap_mom_gap_monthly", "fc_up_cap_mom_gap_biweekly",
+                "fc_up_cap_quality_mom_biweekly", "fc_up_cap_quality_mom_monthly",
+                "fc_mom7m_rec126_monthly",
+                "lowrisk_momentum_top15", "lowbeta_sharpe_mom_top20",
+            ],
+        },
+    },
+}
+
 # Exchange close per price panel. A bar dated today is treated as a closing
 # price only once the session has closed and settled for a few minutes.
 MARKET_SESSION = {
@@ -373,9 +414,10 @@ def session_universes(market: str, strategy_name: str, tickers: list[str],
 def pit_candidates(market: str, strategy_name: str, since: pd.Timestamp | None) -> list[str]:
     """Tickers that were index members on any day from ``since`` to today, so a
     catch-up or replay has prices for names that have left the index since."""
-    if since is None or strategy_name.removeprefix("sim_") in ETF_STRATEGY_UNIVERSES:
+    days = pd.bdate_range(since, pd.Timestamp.today().normalize()) if since is not None else []
+    if len(days) == 0 or strategy_name.removeprefix("sim_") in ETF_STRATEGY_UNIVERSES:
         return []
-    members = index_members(market, pd.bdate_range(since, pd.Timestamp.today().normalize()))
+    members = index_members(market, days)
     return [] if members is None else list(members.columns)
 
 
@@ -484,21 +526,36 @@ def completed_sessions(close_raw: pd.DataFrame, data_market: str, benchmark: str
 # Persistent state
 # ---------------------------------------------------------------------------
 
-def _state_path(market: str, strategy_name: str) -> str:
+def book_dir(book: str | None) -> str:
-    return os.path.join("data", f"trader_{market}_{strategy_name}.json")
+    """Directory holding a book's state files (the original book: data/)."""
+    return os.path.join("data", "books", book) if book else "data"
 
 
-def load_state(market: str, strategy_name: str) -> dict:
+def book_strategies(book: str | None, market: str) -> list[str]:
-    path = _state_path(market, strategy_name)
+    """Strategies a book runs in ``market`` (the original book: all live ones)."""
+    names = LIVE_BOOKS[book]["strategies"][market] if book else DEFAULT_MONITOR_STRATEGIES
+    return [n for n in names if strategy_supports_market(n, market)]
+
+
+def book_start(book: str | None, market: str) -> pd.Timestamp | None:
+    return pd.Timestamp(LIVE_BOOKS[book]["start"][market]) if book else None
+
+
+def _state_path(market: str, strategy_name: str, book: str | None = None) -> str:
+    return os.path.join(book_dir(book), f"trader_{market}_{strategy_name}.json")
+
+
+def load_state(market: str, strategy_name: str, book: str | None = None) -> dict:
+    path = _state_path(market, strategy_name, book)
     if os.path.exists(path):
         with open(path) as f:
             return json.load(f)
     return {}
 
 
-def save_state(state: dict, market: str, strategy_name: str) -> None:
+def save_state(state: dict, market: str, strategy_name: str, book: str | None = None) -> None:
-    os.makedirs("data", exist_ok=True)
+    path = _state_path(market, strategy_name, book)
-    path = _state_path(market, strategy_name)
+    os.makedirs(os.path.dirname(path), exist_ok=True)
     with open(path, "w") as f:
         json.dump(state, f, indent=2, default=str)
 
@@ -831,7 +888,18 @@ def _with_last_known_prices(state: dict, prices: dict) -> dict:
     return out
 
 
+def _book_capital(args, market: str) -> float:
+    book = getattr(args, "book", None)
+    if book:
+        return LIVE_BOOKS[book]["capital"][market]
+    return args.capital or MONITOR_CAPITAL.get(market, 10_000.0)
+
+
 def _strategy_fees(args, market: str) -> dict:
+    book = getattr(args, "book", None)
+    if book:
+        return {"tx_cost": 0.0, "fixed_fee": LIVE_BOOKS[book]["fee_per_order"][market],
+                "fee_base": 0.0, "fee_per_share": 0.0}
     tier = MARKET_FEE_TIERED.get(market, {})
     return {
         "tx_cost": args.tx_cost,
@@ -923,12 +991,13 @@ def cmd_morning(args):
     if not strategy_supports_market(strategy_name, market):
         print(f"{strategy_name} does not run in the {market.upper()} book; skipping.")
         return
+    book = getattr(args, "book", None)
     tickers, benchmark = strategy_universe(market, strategy_name)
 
     # Load or init state
-    state = load_state(market, strategy_name)
+    state = load_state(market, strategy_name, book)
     if not state:
-        capital = args.capital or MONITOR_CAPITAL.get(market, 10_000.0)
+        capital = _book_capital(args, market)
         state = init_state(market, strategy_name, capital)
         print(f"--- Initialized new portfolio: {capital:,.0f} cash ---")
 
@@ -941,6 +1010,10 @@ def cmd_morning(args):
 
     today = open_data.index[-1]
     today_str = str(today.date())
+    start = book_start(book, market)
+    if start is not None and today < start:
+        print(f"{strategy_name}: book {book} starts on {start.date()}; no orders on {today_str}.")
+        return
 
     if state["last_morning"] == today_str:
         print(f"Morning already run for {today_str}. Showing pending trades.\n")
@@ -976,7 +1049,7 @@ def cmd_morning(args):
         "trades": trades,
     }
     state["last_morning"] = today_str
-    save_state(state, market, strategy_name)
+    save_state(state, market, strategy_name, book)
 
     # Print summary
     print(f"\n  Portfolio value (at open): ${total:,.2f}")
@@ -1018,9 +1091,10 @@ def cmd_evening(args):
     """Evening: record execution at close prices, update portfolio."""
     market = args.market
     strategy_name = args.strategy
+    book = getattr(args, "book", None)
     tickers, benchmark = strategy_universe(market, strategy_name)
 
-    state = load_state(market, strategy_name)
+    state = load_state(market, strategy_name, book)
     if not state:
         print("No state found. Run 'morning' first.")
         return
@@ -1082,7 +1156,7 @@ def cmd_evening(args):
 
     state["pending_trades"] = None
     state["last_evening"] = trade_date
-    save_state(state, market, strategy_name)
+    save_state(state, market, strategy_name, book)
 
     n_executed = len(exec_trades)
     total_commission = sum(t.get("commission", 0)
@@ -1115,7 +1189,7 @@ def cmd_status(args):
     market = args.market
     strategy_name = args.strategy
 
-    state = load_state(market, strategy_name)
+    state = load_state(market, strategy_name, getattr(args, "book", None))
     if not state:
         print("No state found. Run 'morning' to initialize.")
         return
@@ -1195,10 +1269,11 @@ def cmd_compare(args):
 
     market = args.market
     strategy_names = getattr(args, "strategy", None)
+    book = getattr(args, "book", None)
 
     # Auto-discover: find all trader_{market}_*.json state files
     if not strategy_names:
-        pattern = os.path.join("data", f"trader_{market}_*.json")
+        pattern = os.path.join(book_dir(book), f"trader_{market}_*.json")
         files = sorted(_glob.glob(pattern))
         strategy_names = []
         for f in files:
@@ -1220,7 +1295,7 @@ def cmd_compare(args):
     # Load all states
     states = {}
     for name in strategy_names:
-        state = load_state(market, name)
+        state = load_state(market, name, book)
         if state and state.get("daily_equity"):
             states[name] = state
         else:
@@ -1341,7 +1416,7 @@ def cmd_log(args):
     market = args.market
     strategy_name = args.strategy
 
-    state = load_state(market, strategy_name)
+    state = load_state(market, strategy_name, getattr(args, "book", None))
     if not state:
         print("No state found. Run 'simulate' or 'auto' first.")
         return
@@ -1712,17 +1787,22 @@ def cmd_monitor(args):
 
         market_fee = MARKET_FEES.get(market, args.fixed_fee)
         eligible = [s for s in strategies if strategy_supports_market(s, market)]
+        runs = [(None, name) for name in eligible] + [
+            (book, name) for book in LIVE_BOOKS for name in book_strategies(book, market)]
         # One download per price panel per phase; strategies then read offline.
         try:
-            refresh_panels(market, eligible, label="monitor")
+            refresh_panels(market, sorted({name for _, name in runs}), label="monitor")
         except Exception as e:
             print(f"[monitor] Panel refresh failed ({e}); using stored prices")
-        for strat_name in eligible:
+        for book, strat_name in runs:
             sub_args = copy.copy(args)
             sub_args.refresh = False
             sub_args.strategy = strat_name
             sub_args.market = market
             sub_args.fixed_fee = market_fee
+            sub_args.book = book
+            if book:
+                strat_name = f"{book}/{strat_name}"
 
             print(f"\n[monitor] --- {market.upper()}:{strat_name} ---")
             try:
@@ -1742,8 +1822,7 @@ def cmd_monitor(args):
                 import traceback
                 traceback.print_exc()
 
-        print(f"[monitor] {market.upper()} {phase} done — "
+        print(f"[monitor] {market.upper()} {phase} done — {len(runs)} books x strategies\n")
-              f"{len(eligible)} strategies\n")
 
     # Catch up sessions missed while the monitor was down. cmd_auto only
     # processes sessions whose close is final, so this is safe at any time.
@@ -1839,6 +1918,9 @@ def _process_sessions(args, state: dict | None, start: pd.Timestamp | None = Non
     if not strategy_supports_market(strategy_name, market):
         print(f"[{label}] {strategy_name} does not run in the {market.upper()} book; skipping.")
         return None
+    fresh = not state
+    if fresh and start is None:
+        start = book_start(getattr(args, "book", None), market)
     tickers, benchmark = strategy_universe(market, strategy_name)
     since = start if not state else (
         pd.Timestamp(state["last_evening"]) if state.get("last_evening") else None)
@@ -1852,15 +1934,22 @@ def _process_sessions(args, state: dict | None, start: pd.Timestamp | None = Non
         print(f"[{label}] No completed session in the price panel.")
         return None
 
-    if not state:
+    if fresh:
-        capital = args.capital or MONITOR_CAPITAL.get(market, 10_000.0)
-        state = init_state(market, strategy_name, capital)
         first = start if start is not None else sessions[-1]
         todo = sessions[sessions >= first]
+        if len(todo) == 0:
+            print(f"[{label}] {strategy_name}: starts on {first.date()}; no session yet.")
+            return None
+        capital = _book_capital(args, market)
+        state = init_state(market, strategy_name, capital)
         print(f"[{label}] Initialized {strategy_name} ({market.upper()}) with {capital:,.0f} cash")
     else:
         last = state.get("last_evening")
-        todo = sessions[sessions > pd.Timestamp(last)] if last else sessions[-1:]
+        first = book_start(getattr(args, "book", None), market)
+        if last:
+            todo = sessions[sessions > pd.Timestamp(last)]
+        else:  # created by a morning run: start with the book's first session
+            todo = sessions[sessions >= first] if first is not None else sessions[-1:]
 
     if len(todo) == 0:
         print(f"[{label}] {strategy_name}: {state.get('last_evening')} already processed.")
@@ -1894,26 +1983,29 @@ def cmd_auto(args):
     For CN market (run at 4pm CST):
         0 16 * * 1-5  cd /path/to/quant && uv run python trader.py auto --market cn
     """
-    state = load_state(args.market, args.strategy)
+    book = getattr(args, "book", None)
+    state = load_state(args.market, args.strategy, book)
     state = _process_sessions(args, state, refresh=getattr(args, "refresh", True))
-    if state is not None:
+    if state is not None and state.get("last_evening"):
-        save_state(state, args.market, args.strategy)
+        save_state(state, args.market, args.strategy, book)
         pnl = state["daily_equity"][state["last_evening"]] - state["initial_capital"]
         print(f"[auto]   P&L since inception: {pnl:>+,.2f} "
               f"({pnl / state['initial_capital']:+.2%}) | state: "
-              f"{_state_path(args.market, args.strategy)}")
+              f"{_state_path(args.market, args.strategy, book)}")
 
 
 def cmd_replay(args):
     """Rebuild live state files by replaying every session from each strategy's start.
 
     Uses exactly the per-session logic of ``auto``. Existing state files are
-    replaced; their original start date is kept unless ``--start`` is given.
+    replaced; their original start date is kept unless ``--start`` is given
+    (a named book replays from its own start date).
     """
     import copy
+    book = getattr(args, "book", None)
     names = args.strategy or sorted(
         os.path.basename(p)[len(f"trader_{args.market}_"):-len(".json")]
-        for p in __import__("glob").glob(os.path.join("data", f"trader_{args.market}_*.json"))
+        for p in __import__("glob").glob(os.path.join(book_dir(book), f"trader_{args.market}_*.json"))
     )
     live_names = [n for n in names if not n.startswith("sim_") and n in STRATEGY_REGISTRY
                   and n not in LIVE_EXCLUDED_STRATEGIES and strategy_supports_market(n, args.market)]
@@ -1930,11 +2022,11 @@ def cmd_replay(args):
                 or not strategy_supports_market(name, args.market):
             print(f"[replay] {args.market.upper()}:{name} is not a live strategy here; "
                   f"removing its state file")
-            if os.path.exists(_state_path(args.market, name)):
+            if os.path.exists(_state_path(args.market, name, book)):
-                os.remove(_state_path(args.market, name))
+                os.remove(_state_path(args.market, name, book))
             continue
-        old = load_state(args.market, name)
+        old = load_state(args.market, name, book)
-        start = pd.Timestamp(args.start) if args.start else (
+        start = pd.Timestamp(args.start) if args.start else book_start(book, args.market) or (
             pd.Timestamp(min(old["daily_equity"])) if old.get("daily_equity") else None
         )
         if start is None:
@@ -1942,7 +2034,7 @@ def cmd_replay(args):
             continue
         state = _process_sessions(sub, None, start=start, label="replay", refresh=False)
         if state is not None:
-            save_state(state, args.market, name)
+            save_state(state, args.market, name, book)
 
 
 # ---------------------------------------------------------------------------
@@ -1953,6 +2045,8 @@ def main():
     parser = argparse.ArgumentParser(description="Daily trading simulation")
     sub = parser.add_subparsers(dest="command", required=True)
 
+    book_help = "Named live book (default: the original book in data/)"
+
     # Common args
     def add_common(p):
         p.add_argument("--market", choices=UNIVERSES.keys(), default="us")
@@ -1965,6 +2059,7 @@ def main():
                        help="Fixed dollar fee per trade")
         p.add_argument("--integer-shares", action="store_true", default=False,
                        help="Only trade whole shares (no fractional)")
+        p.add_argument("--book", choices=list(LIVE_BOOKS), default=None, help=book_help)
 
     # Morning
     p_morning = sub.add_parser("morning", help="Generate trade orders from open prices")
@@ -2013,6 +2108,7 @@ def main():
     p_replay.add_argument("--fixed-fee", type=float, default=0.0,
                           help="Per-trade fee floor (default: per-market MARKET_FEES)")
     p_replay.add_argument("--integer-shares", action=argparse.BooleanOptionalAction, default=True)
+    p_replay.add_argument("--book", choices=list(LIVE_BOOKS), default=None, help=book_help)
 
     # Status (strategy is a free-form string to allow sim_ prefixed names)
     p_status = sub.add_parser("status", help="Show current portfolio")
@@ -2023,6 +2119,7 @@ def main():
     p_status.add_argument("--tx-cost", type=float, default=0.001)
     p_status.add_argument("--fixed-fee", type=float, default=0.0)
     p_status.add_argument("--integer-shares", action="store_true", default=False)
+    p_status.add_argument("--book", choices=list(LIVE_BOOKS), default=None, help=book_help)
 
     # Simulate
     p_sim = sub.add_parser("simulate", help="Simulate over a date range")
@@ -2037,6 +2134,7 @@ def main():
                        help="Strategy name (e.g. sim_recovery_mom_top10)")
     p_log.add_argument("--start", default=None, help="Start date filter (YYYY-MM-DD)")
     p_log.add_argument("--end", default=None, help="End date filter (YYYY-MM-DD)")
+    p_log.add_argument("--book", choices=list(LIVE_BOOKS), default=None, help=book_help)
 
     # Compare strategies
     p_cmp = sub.add_parser("compare",
@@ -2044,6 +2142,7 @@ def main():
     p_cmp.add_argument("--market", choices=UNIVERSES.keys(), default="us")
     p_cmp.add_argument("--strategy", nargs="+", default=None,
                        help="Strategy names to compare (default: auto-discover all)")
+    p_cmp.add_argument("--book", choices=list(LIVE_BOOKS), default=None, help=book_help)
 
     args = parser.parse_args()
 

web/src/client/LivePage.tsx

@@ -16,6 +16,7 @@ import {
   formatNumber,
   formatPct,
   type EquityPoint,
+  type LiveBook,
   type LiveStrategyState,
   type StrategyCurrency,
   type StrategyMarket,
@@ -40,8 +41,29 @@ async function api<T>(path: string, init?: RequestInit): Promise<T> {
 
 type SortKey = "currentValue" | "unrealizedPnlPct" | "name" | "lastUpdated";
 
+const BOOK_STORAGE_KEY = "live.book";
+
+function storedBook(): string | null {
+  try {
+    return window.localStorage.getItem(BOOK_STORAGE_KEY);
+  } catch {
+    return null;
+  }
+}
+
+function storeBook(book: string) {
+  try {
+    window.localStorage.setItem(BOOK_STORAGE_KEY, book);
+  } catch {
+    // storage unavailable: the choice just is not remembered
+  }
+}
+
 export function LivePage() {
   const [market, setMarket] = useState<StrategyMarket>("us");
+  const [books, setBooks] = useState<LiveBook[]>([]);
+  // null until the book list is known; "" is the original book
+  const [book, setBook] = useState<string | null>(null);
   const [strategies, setStrategies] = useState<LiveStrategyState[]>([]);
   const [selectedName, setSelectedName] = useState<string | null>(null);
   const [loading, setLoading] = useState(true);
@@ -49,10 +71,29 @@ export function LivePage() {
   const [sortKey, setSortKey] = useState<SortKey>("unrealizedPnlPct");
   const [filterText, setFilterText] = useState("");
 
-  const refresh = (mk: StrategyMarket = market) => {
+  useEffect(() => {
+    api<LiveBook[]>("/api/strategies/live/books")
+      .then((res) => {
+        setBooks(res);
+        const saved = storedBook();
+        // Default to the newest named book (listed last).
+        setBook(saved !== null && res.some((b) => b.id === saved) ? saved : (res[res.length - 1]?.id ?? ""));
+      })
+      .catch(() => setBook(""));
+  }, []);
+
+  const selectBook = (id: string) => {
+    storeBook(id);
+    setBook(id);
+  };
+
+  const currentBook = books.find((b) => b.id === book);
+
+  const refresh = (mk: StrategyMarket = market, bk: string | null = book) => {
+    if (bk === null) return;
     setLoading(true);
     setError("");
-    api<LiveStrategyState[]>(`/api/strategies/live?market=${mk}`)
+    api<LiveStrategyState[]>(`/api/strategies/live?market=${mk}&book=${encodeURIComponent(bk)}`)
       .then((res) => {
         setStrategies(res);
         if (res.length > 0) {
@@ -68,9 +109,9 @@ export function LivePage() {
   };
 
   useEffect(() => {
-    refresh(market);
+    refresh(market, book);
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [market]);
+  }, [market, book]);
 
   const sorted = useMemo(() => {
     const list = [...strategies];
@@ -111,6 +152,20 @@ export function LivePage() {
           <button className={market === "us" ? "active" : ""} onClick={() => setMarket("us")}>美股</button>
           <button className={market === "cn" ? "active" : ""} onClick={() => setMarket("cn")}>A股</button>
         </div>
+        {books.length > 1 && (
+          <label className="ghostSelectLabel">
+            <span>组合</span>
+            <select
+              className="ghostSelect"
+              value={book ?? ""}
+              onChange={(e) => selectBook(e.target.value)}
+            >
+              {books.map((b) => (
+                <option key={b.id} value={b.id}>{b.label}</option>
+              ))}
+            </select>
+          </label>
+        )}
         <input
           className="ghostInput"
           placeholder="筛选策略..."
@@ -151,7 +206,7 @@ export function LivePage() {
           {loading && sorted.length === 0 ? (
             <p className="hint">加载中...</p>
           ) : sorted.length === 0 ? (
-            <p className="hint">暂无在线策略。运行 quant 的 trader.py auto 后再刷新。</p>
+            <p className="hint">{emptyHint(currentBook, market)}</p>
           ) : (
             <div className="liveList">
               {sorted.map((s) => (
@@ -203,6 +258,14 @@ export function LivePage() {
   );
 }
 
+function emptyHint(book: LiveBook | undefined, market: StrategyMarket): string {
+  if (!book?.startDate) return "暂无在线策略。运行 quant 的 trader.py auto 后再刷新。";
+  const currency = currencyForMarket(market);
+  const fee = book.feePerOrder ? ` · 每笔 ${formatMoney(book.feePerOrder[market], currency)}` : "";
+  return `${book.label}：${book.strategies[market].length} 个策略，各 ${formatMoney(book.capital[market], currency)}${fee}，`
+    + `${book.startDate[market]} 收盘后出现首日记录。`;
+}
+
 function LiveStrategyDetail({ strategy }: { strategy: LiveStrategyState }) {
   const m = strategy;
   const currency = currencyOf(m);

web/src/server/index.ts

@@ -11,7 +11,7 @@ import { WatchlistStore } from "../agent/watchlistStore";
 import { loadIpadsConfig } from "./ipadsConfig";
 import type { ChartPeriod, WatchStock } from "../shared/types";
 import type { BacktestConfig } from "../shared/strategyTypes";
-import { listStrategies, runBacktest, getCachedResult, getLiveStrategies } from "./strategyService";
+import { listStrategies, runBacktest, getCachedResult, getLiveStrategies, getLiveBooks } from "./strategyService";
 
 const port = Number(process.env.PORT ?? 8787);
 const host = process.env.HOST ?? "127.0.0.1";
@@ -284,7 +284,16 @@ app.get("/api/strategies/live", async (request, response, next) => {
   try {
     const market = String(request.query.market ?? "us");
     const strategy = request.query.strategy ? String(request.query.strategy) : undefined;
-    response.json(await getLiveStrategies(market, strategy));
+    const book = request.query.book ? String(request.query.book) : undefined;
+    response.json(await getLiveStrategies(market, strategy, book));
+  } catch (error) {
+    next(error);
+  }
+});
+
+app.get("/api/strategies/live/books", async (_request, response, next) => {
+  try {
+    response.json(await getLiveBooks());
   } catch (error) {
     next(error);
   }

web/src/server/strategyService.ts

@@ -3,7 +3,7 @@ import { createHash } from "node:crypto";
 import { existsSync, mkdirSync, readFileSync, readdirSync, statSync, writeFileSync, unlinkSync } from "node:fs";
 import { join } from "node:path";
 import { REPO_ROOT, WEB_DATA_DIR } from "./paths";
-import type { BacktestConfig, BacktestResult, LiveStrategyState, StrategyInfo } from "../shared/strategyTypes.js";
+import type { BacktestConfig, BacktestResult, LiveBook, LiveStrategyState, StrategyInfo } from "../shared/strategyTypes.js";
 
 const CACHE_DIR = join(WEB_DATA_DIR, "strategy_cache");
 const TIMEOUT_MS = Number(process.env.QUANT_BACKTEST_TIMEOUT_MS) || 180_000;
@@ -157,12 +157,17 @@ export async function getCachedResult(id: string): Promise<BacktestResult | null
   return normalizeBacktestResult(JSON.parse(readFileSync(cachePath, "utf-8")) as BacktestResult);
 }
 
-export async function getLiveStrategies(market: string, strategy?: string): Promise<LiveStrategyState[]> {
+export async function getLiveStrategies(market: string, strategy?: string, book?: string): Promise<LiveStrategyState[]> {
   const args = ["live", "--market", market];
   if (strategy) args.push("--strategy", strategy);
+  if (book) args.push("--book", book);
   return (await runBridge(args)) as LiveStrategyState[];
 }
 
+export async function getLiveBooks(): Promise<LiveBook[]> {
+  return (await runBridge(["books"])) as LiveBook[];
+}
+
 function normalizeBacktestResult(result: BacktestResult): BacktestResult {
   return {
     ...result,

web/src/shared/strategyTypes.ts

@@ -160,6 +160,18 @@ export interface TradeLogEntry {
   commission: number;
 }
 
+// A live book: a cohort of strategies, each with its own account, started on
+// one date with one capital and fee schedule. id "" is the original book.
+export interface LiveBook {
+  id: string;
+  label: string;
+  startDate: Record<StrategyMarket, string> | null;
+  capital: Record<StrategyMarket, number>;
+  // Flat fee per order; null for the original book's tiered schedule.
+  feePerOrder: Record<StrategyMarket, number> | null;
+  strategies: Record<StrategyMarket, string[]>;
+}
+
 export interface LiveStrategyState {
   name: string;
   label: string;