diff --git a/YLErpWeb/fe-tests/swapCalc.test.js b/YLErpWeb/fe-tests/swapCalc.test.js
index 25ff3deb..90dfe9c5 100644
--- a/YLErpWeb/fe-tests/swapCalc.test.js
+++ b/YLErpWeb/fe-tests/swapCalc.test.js
@@ -24,6 +24,17 @@ describe('回归守卫：曾出 bug 的纯函数', () => {
         expect(SwapCalc.deriveTradingAmountAvg(1.02, 100)).toBe(102);
     });
 
+    test('收益结算审批回显提交的期末价格', () => {
+        expectClose(
+            SwapCalc.resolveIncomeTradingAmountAvg(0.98, 0.80, 100, true),
+            80,
+            '债券审批应把已提交相对价0.80还原为界面值80');
+        expectClose(
+            SwapCalc.resolveIncomeTradingAmountAvg(0.98, 0.80, 100, false),
+            98,
+            '普通打开仍以期初全价98作为默认期末价');
+    });
+
     // 3c5f25a5：FloatPnlSum 必须保留 2 位小数
     test('calcFloatPnlSum 保留 2 位 (守卫 3c5f25a5)', () => {
         expectClose(SwapCalc.calcFloatPnlSum(100.456, 1, 0.5, 0), 101.96, '100.456+1+0.5=101.956→101.96');
diff --git a/YLErpWeb/wwwroot/Scripts/app/swaptrade/incomeSwapTrade.js b/YLErpWeb/wwwroot/Scripts/app/swaptrade/incomeSwapTrade.js
index 7afe1c9a..7acad7c4 100644
--- a/YLErpWeb/wwwroot/Scripts/app/swaptrade/incomeSwapTrade.js
+++ b/YLErpWeb/wwwroot/Scripts/app/swaptrade/incomeSwapTrade.js
@@ -86,9 +86,13 @@ const vue = new Vue({
             this.initPosiGrossPrice = this.floatPosition.PosiGrossPrice;
             // 互换标的价格固定为期初净价，与平仓不同不需要用户填写
             // 期初净价入库为相对价(如1.02)，需转换为界面百分比形态(102)，与平仓页保持一致
-            // 守卫: 期末全价必须用 PosiGrossPrice(全价) 且债券 ×100 转界面态
-            // 对应历史 bug dcf649f2(错用净价) / 20ea93d8(×100 缩放丢失); 外置到 swapCalc.deriveTradingAmountAvg
-            this.floatPosition.TradingAmountAvg = SwapCalc.deriveTradingAmountAvg(this.initPosiGrossPrice, this.multiplier);
+            // 普通打开时用期初全价作为默认值；审批打开时必须保留已提交的期末全价，不能再被期初全价覆盖。
+            // 两种来源入库时都是相对价，债券统一 ×100 还原为界面百分比态。
+            this.floatPosition.TradingAmountAvg = SwapCalc.resolveIncomeTradingAmountAvg(
+                this.initPosiGrossPrice,
+                this.floatPosition.TradingAmountAvg,
+                this.multiplier,
+                isUseApproval);
             this.interestList = model.FlowEvents.filter((item) => {
                 return item.InterestMode == 1 || item.InterestMode == 2 || item.InterestMode == 7 || item.InterestMode == 8 || item.InterestMode == 9;
             });
diff --git a/YLErpWeb/wwwroot/Scripts/app/swaptrade/swapCalc.js b/YLErpWeb/wwwroot/Scripts/app/swaptrade/swapCalc.js
index 4e1c39c3..f18f520c 100644
--- a/YLErpWeb/wwwroot/Scripts/app/swaptrade/swapCalc.js
+++ b/YLErpWeb/wwwroot/Scripts/app/swaptrade/swapCalc.js
@@ -48,6 +48,14 @@
         return posiGrossPrice * multiplier;
     }
 
+    // 普通打开时以期初全价作为期末价默认值；审批打开时回显已提交的期末相对价。
+    function resolveIncomeTradingAmountAvg(posiGrossPrice, submittedTradingAmountAvg, multiplier, isUseApproval) {
+        var relativePrice = isUseApproval && submittedTradingAmountAvg !== undefined && submittedTradingAmountAvg !== null
+            ? submittedTradingAmountAvg
+            : posiGrossPrice;
+        return relativePrice * multiplier;
+    }
+
     // 金额四舍五入到指定小数位（避免 0.1+0.2 类浮点误差）
     function roundMoney(value, digits) {
         return roundHalfAwayFromZero(value, digits);
@@ -196,6 +204,7 @@
         roundHalfAwayFromZero: roundHalfAwayFromZero,
         getPriceScale: getPriceScale,
         deriveTradingAmountAvg: deriveTradingAmountAvg,
+        resolveIncomeTradingAmountAvg: resolveIncomeTradingAmountAvg,
         roundMoney: roundMoney,
         calcFloatPnlSum: calcFloatPnlSum,
         calcStockEqvNotional: calcStockEqvNotional,