diff --git a/crates/fidc-core/src/engine.rs b/crates/fidc-core/src/engine.rs
index 877572a..c53c8eb 100644
--- a/crates/fidc-core/src/engine.rs
+++ b/crates/fidc-core/src/engine.rs
@@ -607,7 +607,19 @@ where
             .as_mut()
             .expect("checked execution quote loader")
             .as_mut()(request)?;
+        let requested_symbol_set = requested_symbols.iter().cloned().collect::<BTreeSet<_>>();
+        if let Some(quote) = quotes.iter().find(|quote| {
+            quote.date != execution_date || !requested_symbol_set.contains(&quote.symbol)
+        }) {
+            return Err(BacktestError::Execution(format!(
+                "execution quote loader returned a row outside the request: requested_date={} actual_date={} symbol={}",
+                execution_date, quote.date, quote.symbol
+            )));
+        }
         self.data.add_execution_quotes(quotes);
+        if start_time.is_none() && end_time.is_none() {
+            self.validate_full_day_execution_quote_coverage(execution_date, &requested_symbols)?;
+        }
         for symbol in requested_symbols {
             self.execution_quote_request_cache.insert((
                 execution_date,
@@ -619,6 +631,48 @@ where
         Ok(())
     }
 
+    fn validate_full_day_execution_quote_coverage(
+        &self,
+        execution_date: NaiveDate,
+        requested_symbols: &[String],
+    ) -> Result<(), BacktestError> {
+        let mut missing_active = Vec::new();
+        let mut paused_with_quotes = Vec::new();
+        let mut missing_daily_market = Vec::new();
+        for symbol in requested_symbols {
+            let Some(_candidate) = self.data.candidate(execution_date, symbol) else {
+                continue;
+            };
+            let Some(market) = self.data.market(execution_date, symbol) else {
+                missing_daily_market.push(symbol.clone());
+                continue;
+            };
+            let has_quotes = !self
+                .data
+                .execution_quotes_on(execution_date, symbol)
+                .is_empty();
+            if market.paused {
+                if has_quotes {
+                    paused_with_quotes.push(symbol.clone());
+                }
+                continue;
+            }
+            if market.volume > 0 && !has_quotes {
+                missing_active.push(symbol.clone());
+            }
+        }
+        if missing_daily_market.is_empty()
+            && missing_active.is_empty()
+            && paused_with_quotes.is_empty()
+        {
+            return Ok(());
+        }
+        Err(BacktestError::Execution(format!(
+            "full-minute subscription coverage mismatch on {}: missing_daily_market={:?}, missing_active_minute_bars={:?}, paused_with_minute_bars={:?}",
+            execution_date, missing_daily_market, missing_active, paused_with_quotes
+        )))
+    }
+
     fn ensure_execution_quotes_for_portfolio_times(
         &mut self,
         execution_date: NaiveDate,
@@ -4815,6 +4869,70 @@ mod tests {
         .expect("backtest run")
     }
 
+    fn full_day_coverage_engine(
+        data: DataSet,
+        date: NaiveDate,
+    ) -> BacktestEngine<BuyWhenDecisionDateStrategy, ChinaAShareCostModel, ChinaEquityRuleHooks>
+    {
+        let broker = BrokerSimulator::new_with_execution_price(
+            ChinaAShareCostModel::default(),
+            ChinaEquityRuleHooks,
+            PriceField::Last,
+        )
+        .with_matching_type(MatchingType::MinuteLast)
+        .with_volume_limit(false)
+        .with_liquidity_limit(false);
+        BacktestEngine::new(
+            data,
+            BuyWhenDecisionDateStrategy {
+                decision_date: date,
+            },
+            broker,
+            BacktestConfig {
+                initial_cash: 100_000.0,
+                benchmark_code: "000852.SH".to_string(),
+                start_date: Some(date),
+                end_date: Some(date),
+                decision_lag_trading_days: 0,
+                execution_price_field: PriceField::Last,
+            },
+        )
+    }
+
+    #[test]
+    fn full_minute_coverage_rejects_missing_active_bars_but_allows_paused_or_zero_volume() {
+        let first = d(2025, 1, 2);
+        let second = d(2025, 1, 3);
+        let active = full_day_coverage_engine(dataset(), first);
+        let error = active
+            .validate_full_day_execution_quote_coverage(first, &[SYMBOL.to_string()])
+            .expect_err("active stock with daily volume requires minute bars");
+        assert!(
+            error.to_string().contains("missing_active_minute_bars"),
+            "{error}"
+        );
+
+        let paused_data = dataset_with(
+            market_with_state(first, 10.0, 10.0, true, 11.0, 9.0),
+            market(second, 10.0, 10.0),
+            candidate_with_state(first, true, false),
+            candidate(second),
+        );
+        full_day_coverage_engine(paused_data, first)
+            .validate_full_day_execution_quote_coverage(first, &[SYMBOL.to_string()])
+            .expect("paused stock may have no minute bars");
+
+        let zero_volume_data = dataset_with(
+            market_with_volume(first, 10.0, 10.0, 0),
+            market(second, 10.0, 10.0),
+            candidate(first),
+            candidate(second),
+        );
+        full_day_coverage_engine(zero_volume_data, first)
+            .validate_full_day_execution_quote_coverage(first, &[SYMBOL.to_string()])
+            .expect("zero-volume stock may have no minute bars");
+    }
+
     fn run_scheduled_next_open_with_dataset(dataset: DataSet) -> super::BacktestResult {
         run_scheduled_next_open_with_dataset_and_broker(
             dataset,