diff --git a/crates/fidc-core/src/market_event_context.rs b/crates/fidc-core/src/market_event_context.rs
index 32b7b51..29cbff5 100644
--- a/crates/fidc-core/src/market_event_context.rs
+++ b/crates/fidc-core/src/market_event_context.rs
@@ -164,7 +164,7 @@ pub fn aggregate(request: Request) -> Result<Output, String> {
             ("market_return".into(), Some(average(returns.values().copied(), active))),
             ("market_limit_up_count".into(), Some(ups.len() as f64)),
             ("market_limit_down_count".into(), Some(downs as f64)),
-            ("market_limit_up_rate".into(), (active > unlimited).then(|| ups.len() as f64 / (active - unlimited) as f64)),
+            ("market_limit_up_rate".into(), (touched > 0).then(|| ups.len() as f64 / touched as f64)),
             ("market_broken_limit_rate".into(), (touched > 0).then(|| broken as f64 / touched as f64)),
             ("market_high_board".into(), board),
             ("market_profit_effect".into(), profit),
@@ -221,6 +221,8 @@ mod tests {
         let d=&r.days[1];
         assert_eq!(d.common["market_breadth"],Some(0.5));
         assert_eq!(d.common["market_limit_down_count"],Some(1.0));
+        assert_eq!(d.common["market_limit_up_rate"],Some(1.0));
+        assert_eq!(r.days[0].common["market_limit_up_rate"],Some(0.0));
         assert_eq!(r.days[0].common["market_broken_limit_rate"],Some(1.0));
         assert_eq!(r.days[2].common["market_high_board"],Some(2.0));
         assert!((r.days[2].common["market_profit_effect"].unwrap()-0.1).abs()<1e-12);