diff --git a/Memory.md b/Memory.md
index 456cd1e..e8041c0 100644
--- a/Memory.md
+++ b/Memory.md
@@ -1,5 +1,11 @@
 # Omniledger 架构与开发记忆 (Memory)
 
+## 全局修复多币种聚合漏洞，强制叠加汇率乘数 (Task 58)
+- 修复了跨币种资产直接相加导致的盈亏总额失真问题：USD 盈利未乘以 ~7.23 汇率被当作 CNY 计算，HKD 亏损同理。
+- 在 `src/actions/portfolio.ts` 的 `getPortfolioPositions()` 中，对每个资产获取 `exchangeRate`（Base Currency → CNY），将财务引擎 (`calculateAssetMetrics`) 产出的所有绝对金额字段（`marketValue`、`floatingPnl`、`accumulatedPnl`、`dilutedCost`）乘以汇率，映射为 `Cny` 结尾的新字段，确保 Dashboard 列表中的 CNY 聚合数据精确。
+- 在 `src/actions/snapshots.ts` 的 `reconstructPortfolioHistory()` 中，修复时光机逐日汇总逻辑：`metrics.marketValue` 已使用 CNY 价格计算可直接取用，`metrics.totalInvested` 基于原始币种价格需乘以 `exchangeRate` 折算为 CNY，确保历史成本曲线正确。
+- 重新触发时光机清洗，成功重构 1247 天历史快照数据。
+
 ## 重构历史快照生成逻辑，消除新旧算法断层 (Task 57)
 - 将时光机重构逻辑全面接入 finance utils 引擎，清洗历史脏快照，消除新旧算法迭代导致的本金曲线断层。
 - 在 `src/utils/finance.ts` 的 `calculateAssetMetrics` 返回值中新增 `totalInvested` 字段，直接输出真实投入本金（含手续费），避免通过 `marketValue - accumulatedPnl` 间接推导导致的精度损失。
diff --git a/src/actions/portfolio.ts b/src/actions/portfolio.ts
index fda81f6..21e09ed 100644
--- a/src/actions/portfolio.ts
+++ b/src/actions/portfolio.ts
@@ -24,8 +24,12 @@ interface Position {
   realizedPnlCny: string;
   avgCost: string;
   dilutedCost: string;
+  dilutedCostCny: string;
   floatingPnl: string;
+  floatingPnlCny: string;
   accumulatedPnl: string;
+  accumulatedPnlCny: string;
+  marketValueCny: string;
   holdingDays: number;
   exchange: string;
   accumulatedDividendsCny: string;
@@ -326,6 +330,17 @@ export async function getPortfolioPositions(): Promise<Position[]> {
       holding.latestPrice
     );
 
+    // 获取资产对人民币的汇率
+    const fxRate = new Big(
+      getRate(rateMap, holding.baseCurrency, 'CNY') || '1'
+    );
+
+    // 将引擎返回的原生币种金额折算为 CNY
+    const marketValueCny = new Big(metrics.marketValue).times(fxRate).toString();
+    const floatingPnlCny = new Big(metrics.floatingPnl).times(fxRate).toString();
+    const accumulatedPnlCny = new Big(metrics.accumulatedPnl).times(fxRate).toString();
+    const dilutedCostCny = new Big(metrics.dilutedCost).times(fxRate).toString();
+
     const holdingNative = new Big(metrics.holdings);
     const avgCostNative = new Big(metrics.averageCost);
     const dilutedCostNative = new Big(metrics.dilutedCost);
@@ -370,8 +385,12 @@ export async function getPortfolioPositions(): Promise<Position[]> {
       realizedPnlCny: holding.realizedPnlCny.toString(),
       avgCost: metrics.averageCost,
       dilutedCost: metrics.dilutedCost,
+      dilutedCostCny,
       floatingPnl: metrics.floatingPnl,
+      floatingPnlCny,
       accumulatedPnl: metrics.accumulatedPnl,
+      accumulatedPnlCny,
+      marketValueCny,
       holdingDays,
       exchange: holding.exchange,
       accumulatedDividendsCny: holding.accumulatedDividendsCny.toString(),
diff --git a/src/actions/snapshots.ts b/src/actions/snapshots.ts
index e527f33..e6734e9 100644
--- a/src/actions/snapshots.ts
+++ b/src/actions/snapshots.ts
@@ -333,8 +333,16 @@ export async function reconstructPortfolioHistory() {
 
       const metrics = calculateAssetMetrics(assetTxs, cnyPrice);
 
-      totalValueCny = totalValueCny.plus(metrics.marketValue);
-      totalCostCny = totalCostCny.plus(metrics.totalInvested);
+      // 获取资产对人民币的汇率
+      const assetFxRate = new Big(getRate(baseCurrency, 'CNY') || '1');
+
+      // marketValue 已使用 CNY 价格计算，直接取用
+      // totalInvested 基于原始币种价格，需乘以汇率折算为 CNY
+      const posValueCny = new Big(metrics.marketValue);
+      const posCostCny = new Big(metrics.totalInvested).times(assetFxRate);
+
+      totalValueCny = totalValueCny.plus(posValueCny);
+      totalCostCny = totalCostCny.plus(posCostCny);
     }
 
     const existing = await db