diff --git a/static/index.html b/static/index.html
index da149050..0e6467e7 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1932,8 +1932,8 @@ function renderResearch() {
   el.innerHTML = '<div class="flex gap-2 items-center mb-3 flex-wrap">' +
     '<h2 class="text-lg font-bold">📋 策略研究 — 版本迭代对比</h2>' +
     '<select id="btPeriod" class="bg-slate-800 text-sm rounded-lg px-2 py-1 border border-slate-700">' +
-    '<option value="1m">近 1 个月</option><option value="6m" selected>近 6 个月</option>' +
-    '<option value="1y">近 1 年</option></select>' +
+    '<option value="1m">近 1 个月</option><option value="6m">近 6 个月</option>' +
+    '<option value="1y">近 1 年</option><option value="2y" selected>近 2 年</option></select>' +
     '<span class="text-xs text-slate-500">每版策略基于上一版归因分析迭代 · 点击行展开明细</span></div>' +
     '<div id="strategyList"><div class="text-slate-500 text-sm">加载中...</div></div>' +
     '<div id="strategyDetail" class="mt-4"></div>';