diff --git a/backend/internal/services/stock_sync.go b/backend/internal/services/stock_sync.go
index 6e9809f..c67e788 100644
--- a/backend/internal/services/stock_sync.go
+++ b/backend/internal/services/stock_sync.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"log"
+	"math"
 	"sync"
 	"time"
 
@@ -95,18 +96,27 @@ func (s *StockSyncService) doSync(ctx context.Context) (int, error) {
 	records := make([]models.StockDailyQuote, 0, len(quotes))
 	for _, q := range quotes {
 		tradeDate := msToDate(q.Timestamp)
+		open := round2(q.Open)
+		high := round2(q.High)
+		low := round2(q.Low)
+		close := round2(q.Close)
+		prevClose := round2(q.PrevClose)
+		var changePct float64
+		if prevClose != 0 {
+			changePct = (close - prevClose) / prevClose
+		}
 		records = append(records, models.StockDailyQuote{
 			Symbol:       q.Symbol,
 			Name:         q.DisplayName(),
 			TradeDate:    tradeDate,
-			Open:         q.Open,
-			High:         q.High,
-			Low:          q.Low,
-			Close:        q.Close,
-			PrevClose:    q.PrevClose,
+			Open:         open,
+			High:         high,
+			Low:          low,
+			Close:        close,
+			PrevClose:    prevClose,
 			Volume:       q.Volume,
 			Amount:       q.Amount,
-			ChangePct:    q.ChangePct(),
+			ChangePct:    changePct,
 			TurnoverRate: q.TurnoverRate(),
 			Region:       q.Region,
 		})
@@ -140,3 +150,7 @@ func today() time.Time {
 func msToDate(ms int64) time.Time {
 	return time.UnixMilli(ms).In(chinaLoc).Truncate(24 * time.Hour)
 }
+
+func round2(v float64) float64 {
+	return math.Round(v*100) / 100
+}