diff --git a/AssetManager.Data/TiingoTicker.cs b/AssetManager.Data/TiingoTicker.cs
index 255c349..7fe47f2 100644
--- a/AssetManager.Data/TiingoTicker.cs
+++ b/AssetManager.Data/TiingoTicker.cs
@@ -37,26 +37,4 @@ public class TiingoTicker
     /// </summary>
     [SugarColumn(ColumnDataType = "varchar(10)")]
     public string? PriceCurrency { get; set; }
-
-    /// <summary>
-    /// 数据开始日期（startDate）
-    /// </summary>
-    [SugarColumn(IsNullable = true)]
-    public DateTime? StartDate { get; set; }
-
-    /// <summary>
-    /// 数据结束日期（endDate）
-    /// </summary>
-    [SugarColumn(IsNullable = true)]
-    public DateTime? EndDate { get; set; }
-
-    /// <summary>
-    /// 创建时间
-    /// </summary>
-    public DateTime CreatedAt { get; set; } = DateTime.Now;
-
-    /// <summary>
-    /// 更新时间
-    /// </summary>
-    public DateTime UpdatedAt { get; set; } = DateTime.Now;
 }
diff --git a/AssetManager.Infrastructure/Services/MarketDataService.cs b/AssetManager.Infrastructure/Services/MarketDataService.cs
index 1081850..c0d77e8 100644
--- a/AssetManager.Infrastructure/Services/MarketDataService.cs
+++ b/AssetManager.Infrastructure/Services/MarketDataService.cs
@@ -1,3 +1,4 @@
+using System.Net.Http.Json;
 using System.Text.Json;
 using AssetManager.Models.DTOs;
 using Microsoft.Extensions.Logging;