diff --git a/AssetManager.API/Program.cs b/AssetManager.API/Program.cs
index 5ce69f7..814b32d 100755
--- a/AssetManager.API/Program.cs
+++ b/AssetManager.API/Program.cs
@@ -93,6 +93,7 @@ builder.Services.AddScoped<AssetManager.Services.IPortfolioFacade, AssetManager.
 
 // 市场数据子服务（组合模式）
 builder.Services.AddScoped<AssetManager.Infrastructure.Services.ITencentMarketService, AssetManager.Infrastructure.Services.TencentMarketService>();
+builder.Services.AddScoped<AssetManager.Infrastructure.Services.IYahooMarketService, AssetManager.Infrastructure.Services.YahooMarketService>();
 builder.Services.AddScoped<AssetManager.Infrastructure.Services.ITiingoMarketService, AssetManager.Infrastructure.Services.TiingoMarketService>();
 builder.Services.AddScoped<AssetManager.Infrastructure.Services.IOkxMarketService, AssetManager.Infrastructure.Services.OkxMarketService>();
 
diff --git a/AssetManager.Infrastructure/AssetManager.Infrastructure.csproj b/AssetManager.Infrastructure/AssetManager.Infrastructure.csproj
index 0fd5970..d346f50 100755
--- a/AssetManager.Infrastructure/AssetManager.Infrastructure.csproj
+++ b/AssetManager.Infrastructure/AssetManager.Infrastructure.csproj
@@ -6,9 +6,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.3" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
-    <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.5" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.5" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.5" />
+    <PackageReference Include="YahooQuotesApi" Version="7.0.6" />
   </ItemGroup>
 
   <PropertyGroup>
diff --git a/AssetManager.Infrastructure/Services/MarketDataService.cs b/AssetManager.Infrastructure/Services/MarketDataService.cs
index 5c1bbf5..32f6035 100755
--- a/AssetManager.Infrastructure/Services/MarketDataService.cs
+++ b/AssetManager.Infrastructure/Services/MarketDataService.cs
@@ -6,12 +6,13 @@ using Microsoft.Extensions.Logging;
 namespace AssetManager.Infrastructure.Services;
 
 /// <summary>
-/// 市场数据服务实现（组合模式：腾讯财经优先，Tiingo降级，OKX处理加密货币）
+/// 市场数据服务实现（组合模式：Yahoo财经优先，腾讯财经降级，Tiingo最终降级，OKX处理加密货币）
 /// </summary>
 public class MarketDataService : IMarketDataService
 {
     private readonly ILogger<MarketDataService> _logger;
     private readonly ITencentMarketService _tencentService;
+    private readonly IYahooMarketService _yahooService;
     private readonly ITiingoMarketService _tiingoService;
     private readonly IOkxMarketService _okxService;
     private readonly IMarketDataRepository _marketDataRepo;
@@ -19,12 +20,14 @@ public class MarketDataService : IMarketDataService
     public MarketDataService(
         ILogger<MarketDataService> logger,
         ITencentMarketService tencentService,
+        IYahooMarketService yahooService,
         ITiingoMarketService tiingoService,
         IOkxMarketService okxService,
         IMarketDataRepository marketDataRepo)
     {
         _logger = logger;
         _tencentService = tencentService;
+        _yahooService = yahooService;
         _tiingoService = tiingoService;
         _okxService = okxService;
         _marketDataRepo = marketDataRepo;
@@ -64,17 +67,26 @@ public class MarketDataService : IMarketDataService
         }
         else
         {
-            // 股票：优先腾讯财经，失败降级 Tiingo
+            // 股票：优先Yahoo财经，失败降级腾讯财经，最后降级 Tiingo
             try
             {
-                response = await _tencentService.GetStockPriceAsync(symbol);
-                source = "Tencent";
+                response = await _yahooService.GetStockPriceAsync(symbol);
+                source = "Yahoo";
             }
             catch (Exception ex)
             {
-                _logger.LogWarning(ex, "腾讯财经获取失败，降级使用 Tiingo: {Symbol}", symbol);
-                response = await _tiingoService.GetStockPriceAsync(symbol);
-                source = "Tiingo";
+                _logger.LogWarning(ex, "Yahoo财经获取失败，降级使用 腾讯: {Symbol}", symbol);
+                try
+                {
+                    response = await _tencentService.GetStockPriceAsync(symbol);
+                    source = "Tencent";
+                }
+                catch (Exception tencentEx)
+                {
+                    _logger.LogWarning(tencentEx, "腾讯财经获取失败，降级使用 Tiingo: {Symbol}", symbol);
+                    response = await _tiingoService.GetStockPriceAsync(symbol);
+                    source = "Tiingo";
+                }
             }
         }
 
@@ -123,24 +135,40 @@ public class MarketDataService : IMarketDataService
         }
         else
         {
-            // 股票：优先腾讯财经，失败降级 Tiingo
+            // 股票：优先Yahoo财经，失败降级腾讯财经，最后降级 Tiingo
             try
             {
-                response = await _tencentService.GetStockHistoricalDataAsync(symbol, timeframe, limit);
+                response = await _yahooService.GetStockHistoricalDataAsync(symbol, timeframe, limit);
                 if (response.Count > 0)
                 {
-                    source = "Tencent";
+                    source = "Yahoo";
                 }
                 else
                 {
-                    throw new Exception("腾讯财经返回空数据");
+                    throw new Exception("Yahoo财经返回空数据");
                 }
             }
             catch (Exception ex)
             {
-                _logger.LogWarning(ex, "腾讯财经历史数据获取失败，降级使用 Tiingo: {Symbol}", symbol);
-                response = await _tiingoService.GetStockHistoricalDataAsync(symbol, timeframe, limit);
-                source = "Tiingo";
+                _logger.LogWarning(ex, "Yahoo财经历史数据获取失败，降级使用 腾讯: {Symbol}", symbol);
+                try
+                {
+                    response = await _tencentService.GetStockHistoricalDataAsync(symbol, timeframe, limit);
+                    if (response.Count > 0)
+                    {
+                        source = "Tencent";
+                    }
+                    else
+                    {
+                        throw new Exception("腾讯财经返回空数据");
+                    }
+                }
+                catch (Exception tencentEx)
+                {
+                    _logger.LogWarning(tencentEx, "腾讯财经历史数据获取失败，降级使用 Tiingo: {Symbol}", symbol);
+                    response = await _tiingoService.GetStockHistoricalDataAsync(symbol, timeframe, limit);
+                    source = "Tiingo";
+                }
             }
         }
 
diff --git a/AssetManager.Infrastructure/Services/YahooMarketService.cs b/AssetManager.Infrastructure/Services/YahooMarketService.cs
new file mode 100644
index 0000000..079573c
--- /dev/null
+++ b/AssetManager.Infrastructure/Services/YahooMarketService.cs
@@ -0,0 +1,114 @@
+using NodaTime;
+using YahooQuotesApi;
+using AssetManager.Data;
+using AssetManager.Models.DTOs;
+using Microsoft.Extensions.Logging;
+using System.Collections.Immutable;
+
+namespace AssetManager.Infrastructure.Services;
+
+
+/// <summary>
+/// Yahoo财经市场数据服务接口
+/// </summary>
+public interface IYahooMarketService
+{
+    /// <summary>
+    /// 获取股票实时价格
+    /// </summary>
+    Task<MarketPriceResponse> GetStockPriceAsync(string symbol);
+    
+    /// <summary>
+    /// 获取股票历史K线数据
+    /// </summary>
+    Task<List<MarketDataResponse>> GetStockHistoricalDataAsync(string symbol, string timeframe, int limit);
+}
+/// <summary>
+/// Yahoo财经市场数据服务实现
+/// </summary>
+public class YahooMarketService : IYahooMarketService
+{
+    private readonly ILogger<YahooMarketService> _logger;
+    private readonly YahooQuotes _yahooQuotes;
+
+    public YahooMarketService(ILogger<YahooMarketService> logger)
+    {
+        _logger = logger;
+        _yahooQuotes = new YahooQuotesBuilder().Build();
+    }
+
+    public async Task<MarketPriceResponse> GetStockPriceAsync(string symbol)
+    {
+        _logger.LogInformation("Yahoo获取股票价格: {Symbol}", symbol);
+        
+        Snapshot? snapshot = await _yahooQuotes.GetSnapshotAsync(symbol);
+        if (snapshot is null)
+            throw new Exception($"Yahoo未知标的: {symbol}");
+        
+        decimal price = snapshot.RegularMarketPrice;
+        if (price <= 0)
+            throw new Exception($"Yahoo获取价格失败，标的: {symbol}");
+        
+        decimal previousClose = snapshot.RegularMarketPreviousClose;
+        if (previousClose <= 0)
+            previousClose = price;
+        
+        _logger.LogDebug("Yahoo接口返回 {Symbol}：最新价 {CurrentPrice}，昨收价 {PrevClose}", 
+            symbol, price, previousClose);
+
+        return new MarketPriceResponse
+        {
+            Symbol = symbol,
+            Price = price,
+            PreviousClose = previousClose,
+            Timestamp = DateTime.UtcNow,
+            AssetType = "Stock"
+        };
+    }
+
+    public async Task<List<MarketDataResponse>> GetStockHistoricalDataAsync(string symbol, string timeframe, int limit)
+    {
+        _logger.LogInformation("Yahoo获取历史数据: {Symbol}, {Timeframe}, {Limit}", symbol, timeframe, limit);
+        
+        // 计算历史数据的开始时间
+        Instant startDate = Instant.FromDateTimeUtc(DateTime.UtcNow.AddDays(-limit * 2));
+        
+        YahooQuotes yahooQuotes = new YahooQuotesBuilder()
+            .WithHistoryStartDate(startDate)
+            .Build();
+        
+        Result<History> result = await yahooQuotes.GetHistoryAsync(symbol);
+        if (result.Value == null)
+            throw new Exception($"Yahoo获取历史数据失败，标的: {symbol}");
+        
+        History history = result.Value;
+        var ticks = history.Ticks;
+        
+        var marketDataList = new List<MarketDataResponse>();
+        
+        foreach (var tick in ticks)
+        {
+            marketDataList.Add(new MarketDataResponse
+            {
+                Symbol = symbol,
+                Timestamp = tick.Date.ToDateTimeUtc(),
+                Open = (decimal)tick.Open,
+                High = (decimal)tick.High,
+                Low = (decimal)tick.Low,
+                Close = (decimal)tick.Close,
+                Volume = (decimal)tick.Volume,
+                AssetType = "Stock"
+            });
+        }
+        
+        // 按时间戳排序并取最近的limit条
+        var sortedData = marketDataList
+            .OrderBy(x => x.Timestamp)
+            .TakeLast(limit)
+            .ToList();
+        
+        _logger.LogInformation("Yahoo获取 {Symbol} 历史数据 {Count} 条", symbol, sortedData.Count);
+        
+        return sortedData;
+    }
+}
\ No newline at end of file
diff --git a/AssetManager.Services/AssetManager.Services.csproj b/AssetManager.Services/AssetManager.Services.csproj
index 179441e..8d2d087 100755
--- a/AssetManager.Services/AssetManager.Services.csproj
+++ b/AssetManager.Services/AssetManager.Services.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <ItemGroup>
     <ProjectReference Include="..\AssetManager.Data\AssetManager.Data.csproj" />
@@ -7,7 +7,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.3" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="10.0.5" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.16.0" />
   </ItemGroup>
 
diff --git a/AssetManager.Tests/Services/MarketDataServiceTests.cs b/AssetManager.Tests/Services/MarketDataServiceTests.cs
index 0e7333d..487122b 100644
--- a/AssetManager.Tests/Services/MarketDataServiceTests.cs
+++ b/AssetManager.Tests/Services/MarketDataServiceTests.cs
@@ -15,6 +15,7 @@ public class MarketDataServiceTests
 {
     private readonly Mock<ITencentMarketService> _tencentMock;
     private readonly Mock<ITiingoMarketService> _tiingoMock;
+    private readonly Mock<IYahooMarketService>  _yahooService;
     private readonly Mock<IOkxMarketService> _okxMock;
     private readonly Mock<IMarketDataRepository> _repoMock;
     private readonly Mock<ILogger<MarketDataService>> _loggerMock;
@@ -24,6 +25,7 @@ public class MarketDataServiceTests
     {
         _tencentMock = new Mock<ITencentMarketService>();
         _tiingoMock = new Mock<ITiingoMarketService>();
+        _yahooService = new Mock<IYahooMarketService>();
         _okxMock = new Mock<IOkxMarketService>();
         _repoMock = new Mock<IMarketDataRepository>();
         _loggerMock = new Mock<ILogger<MarketDataService>>();
@@ -31,6 +33,7 @@ public class MarketDataServiceTests
         _service = new MarketDataService(
             _loggerMock.Object,
             _tencentMock.Object,
+            _yahooService.Object,
             _tiingoMock.Object,
             _okxMock.Object,
             _repoMock.Object