diff --git a/src/fxhnt/application/dashboard_service.py b/src/fxhnt/application/dashboard_service.py
index 081305b..df74f42 100644
--- a/src/fxhnt/application/dashboard_service.py
+++ b/src/fxhnt/application/dashboard_service.py
@@ -38,7 +38,13 @@ def _expected_book_symbols() -> frozenset[str]:
     from fxhnt.domain.strategies.multistrat import FUND_INSTRUMENTS
     syms = set(FUND_INSTRUMENTS)
     try:
-        syms |= {listing.ticker for listing in get_settings().ucits.map.values()}
+        # Include BOTH the cosmetic ticker AND the symbol IBKR actually REPORTS the holding under
+        # (`ibkr_symbol`, which diverges for the IEF line: ticker CBU0 -> reported CSBGU0, probe 2026-07-20).
+        # account_snapshot reads `p.contract.symbol`, so a legitimate book holding IBKR reports as CSBGU0 must
+        # be in this set or it is wrongly flagged a stray and dropped from the book's NLV.
+        for listing in get_settings().ucits.map.values():
+            syms.add(listing.ticker)
+            syms.add(listing.ibkr_symbol)
     except Exception:  # noqa: BLE001 — config-less test path: the US instruments alone still guard the check
         pass
     return frozenset(syms)
@@ -152,10 +158,11 @@ class DashboardService:
             b = backtests.get(reg.strategy_id)   # most strategies have no backtest verdict -> None
             meta = STRATEGY_REGISTRY.get(reg.strategy_id, {})   # honest not-live flag lives in the Python registry
             if meta.get("archived"):   # defense-in-depth: `registry()` already excludes archived rows (the
-                continue                # authoritative filter), so an archived sleeve (vrp/vrp_exec) never reaches here.
+                continue                # authoritative filter), so an archived sleeve never reaches here.
             min_days = _gate_min_days(reg.gate_spec)   # warming = fewer forward days than the gate needs
             out.append(FleetRow(
-                strategy_id=reg.strategy_id, display_name=display_name(reg.strategy_id, reg.display_name), sleeve=reg.sleeve,
+                strategy_id=reg.strategy_id, sleeve=reg.sleeve,
+                display_name=display_name(reg.strategy_id, reg.display_name),
                 days=s.days if s else 0,
                 total_return_pct=100.0 * s.total_return if s else 0.0,
                 sharpe=s.sharpe if s else 0.0, maxdd=s.maxdd if s else 0.0,
@@ -428,7 +435,8 @@ class DashboardService:
         periods = {p: aggregate(dates, rets, p) for p in PERIODS}   # raw daily/weekly/monthly, no normalization
         pair = self._exec_pair(strategy_id, summaries)
         return StrategyDetail(
-            strategy_id=strategy_id, display_name=display_name(strategy_id, reg.display_name), sleeve=reg.sleeve, venue=reg.venue,
+            strategy_id=strategy_id, sleeve=reg.sleeve, venue=reg.venue,
+            display_name=display_name(strategy_id, reg.display_name),
             days=s.days if s else 0, total_return_pct=100.0 * s.total_return if s else 0.0,
             sharpe=s.sharpe if s else 0.0, maxdd=s.maxdd if s else 0.0,
             gate_status=s.gate_status if s else "WAIT",
diff --git a/src/fxhnt/config.py b/src/fxhnt/config.py
index 7fbba3f..e5d9d71 100644
--- a/src/fxhnt/config.py
+++ b/src/fxhnt/config.py
@@ -114,6 +114,12 @@ class UcitsListing(BaseModel):
     isin: str                      # unambiguous security id (e.g. "IE00B5BMR087") — the real resolution key
     exchange: str = "LSEETF"       # the LSE ETF venue: LSEETF + ISIN + USD resolves the line (SMART+ISIN = 0)
     currency: str = "USD"
+    # The symbol IBKR REPORTS a HOLDING of this line under (`contract.symbol` from `positions()`), which can
+    # diverge from the cosmetic `ticker`. Probe-verified live 2026-07-20 (`probe-ucits-symbols`): only IEF's
+    # `CBU0` diverges → IBKR reports it as `CSBGU0`; the other 5 lines report under their ticker. The cockpit's
+    # NLV stray-check (`_expected_book_symbols`) keys on this, so a legitimate book position is not mislabeled
+    # a stray + dropped from NLV. Defaults to `ticker` when they match (the common case).
+    ibkr_symbol: str = ""
     # Yahoo LSE daily-volume ticker (ADV input for the UCITS-regime capacity/cost model). Defaults to
     # f"{ticker}.L" when left empty; set explicitly if Yahoo's symbol diverges from the display ticker.
     yahoo_ticker: str = ""
@@ -122,9 +128,11 @@ class UcitsListing(BaseModel):
     half_spread_bps: float = 10.0
 
     @model_validator(mode="after")
-    def _default_yahoo_ticker(self) -> "UcitsListing":
+    def _default_derived_fields(self) -> UcitsListing:
         if not self.yahoo_ticker:
             self.yahoo_ticker = f"{self.ticker}.L"
+        if not self.ibkr_symbol:                 # the common case: IBKR reports the holding under the ticker
+            self.ibkr_symbol = self.ticker
         return self
 
 
@@ -149,6 +157,7 @@ class UcitsSettings(BaseSettings):
     map: dict[str, UcitsListing] = Field(default_factory=lambda: {
         "SPY": UcitsListing(ticker="CSPX", isin="IE00B5BMR087", half_spread_bps=1.5),
         "IEF": UcitsListing(ticker="CBU0", isin="IE00B3VWN518", yahoo_ticker="CBU0.L",  # Acc line, ~$12M ADV
+                            ibkr_symbol="CSBGU0",  # IBKR reports the HOLDING under CSBGU0 (probe 2026-07-20)
                             half_spread_bps=2.0),
         "GLD": UcitsListing(ticker="IGLN", isin="IE00B4ND3602",   # USD line = IGLN (SGLN is the GBP line)
                             half_spread_bps=2.0),
diff --git a/tests/integration/test_ibkr_account_detail_web.py b/tests/integration/test_ibkr_account_detail_web.py
index f266fcc..bcccd34 100644
--- a/tests/integration/test_ibkr_account_detail_web.py
+++ b/tests/integration/test_ibkr_account_detail_web.py
@@ -192,3 +192,24 @@ def test_clean_account_holdings_show_no_stray_warning() -> None:
     # SPY + IEF are both book instruments -> no "outside the book" warning renders.
     html = _client(_seed_forward(), _seed_ibkr()).get("/strategy/multistrat").text
     assert "outside the book" not in html
+
+
+def test_ibkr_reported_ucits_symbol_csbgu0_is_not_flagged_stray() -> None:
+    # The IEF UCITS line's config ticker is CBU0, but IBKR REPORTS the holding under its canonical symbol
+    # CSBGU0 (probe-verified 2026-07-20). A legitimate CSBGU0 book position must NOT be flagged "outside the
+    # book" / dropped from NLV — the expected set keys on `ibkr_symbol`, not just the display ticker. A genuine
+    # stray (IBIT) in the SAME account is still flagged.
+    fwd = _seed_forward()
+    ibkr = IbkrAccountRepo("sqlite://")
+    ibkr.migrate()
+    at = dt.datetime(2026, 7, 20, 15, 0)
+    ibkr.replace_snapshot("2026-07-20", nlv=1_000_000.0, cash=900_000.0, gross=100_000.0,
+                          positions={"CSPX": 13.0, "CSBGU0": 55.0, "IBIT": 699.0}, at=at)
+    ibkr.record_fills(strategy_id="multistrat", rebalance_id="r1",
+                      fills=[FillDTO(symbol="CSBGU0", side="BOT", qty=55.0, price=153.8, fee=1.0,
+                                     status="Filled", shortfall_bps=0.0)], at=at)
+    html = _client(fwd, ibkr).get("/strategy/multistrat").text
+    banner = re.search(r"Position outside the book:[^<]*", html)
+    assert banner is not None                          # IBIT is still a genuine stray
+    assert "IBIT" in banner.group(0)
+    assert "CSBGU0" not in banner.group(0)             # the IEF book line is NOT flagged stray