diff --git a/strategy_lab.py b/strategy_lab.py
index 5ca4ec37..900d9678 100644
--- a/strategy_lab.py
+++ b/strategy_lab.py
@@ -680,7 +680,7 @@ def has_breakout_dna(bars, i, lookback=10):
     return False
 
 
-def run_backtest(strategy_version, start_date, end_date, capital=1000000, save=True, universe='all'):
+def run_backtest(strategy_version, start_date, end_date, capital=1000000, save=True, universe='all', period_tag='2y'):
     strat = get_strategy(strategy_version)
     cfg = strat['config']
     entry_cfg, exit_cfg = cfg['entry'], cfg['exit']
@@ -1059,6 +1059,7 @@ def run_backtest(strategy_version, start_date, end_date, capital=1000000, save=T
         'strategy_name': strat['name'],
         'market': universe,
         'period': f"{start_date} ~ {end_date}",
+        'period_tag': period_tag,
         'capital': capital,
         'total_stocks_screened': screened,
         'scored_events': scored_n,
@@ -1418,6 +1419,10 @@ def init_table():
         conn.execute("ALTER TABLE strategy_research ADD COLUMN market TEXT DEFAULT 'all'")
     except sqlite3.OperationalError:
         pass
+    try:
+        conn.execute("ALTER TABLE strategy_research ADD COLUMN period_tag TEXT DEFAULT '2y'")
+    except sqlite3.OperationalError:
+        pass
     conn.commit()
     conn.close()
 
@@ -1427,12 +1432,12 @@ def save_result(strat, result):
     conn = sqlite3.connect(DB_PATH)
     conn.execute("""
         INSERT INTO strategy_research (version, name, summary, hypothesis, parent,
-                                       config_json, results_json, period, created_at, market)
-        VALUES (?,?,?,?,?,?,?,?,?,?)
+                                       config_json, results_json, period, created_at, market, period_tag)
+        VALUES (?,?,?,?,?,?,?,?,?,?,?)
     """, (strat['version'], strat['name'], strat['summary'], strat['hypothesis'],
           strat.get('parent'), json.dumps(strat['config'], ensure_ascii=False),
           json.dumps(result, ensure_ascii=False), result['period'],
-          datetime.now().strftime('%Y-%m-%d %H:%M:%S'), result.get('market', 'all')))
+          datetime.now().strftime('%Y-%m-%d %H:%M:%S'), result.get('market', 'all'), result.get('period_tag', '2y')))
     conn.commit()
     conn.close()
 
@@ -1448,18 +1453,29 @@ def save_analysis(version, analysis):
     conn.close()
 
 
-def list_strategies():
+def list_strategies(period_tag=None):
     init_table()
     conn = sqlite3.connect(DB_PATH)
     conn.row_factory = sqlite3.Row
-    # 每个 (version, market) 组合取最新一条
-    rows = conn.execute("""
-        SELECT sr.* FROM strategy_research sr
-        INNER JOIN (SELECT version, COALESCE(market,'all') as mkt, MAX(id) as max_id
-                    FROM strategy_research GROUP BY version, COALESCE(market,'all')) latest
-        ON sr.id = latest.max_id
-        ORDER BY sr.version
-    """).fetchall()
+    if period_tag:
+        # 指定区间：每个 (version, market) 取该区间最新一条
+        rows = conn.execute("""
+            SELECT sr.* FROM strategy_research sr
+            INNER JOIN (SELECT version, COALESCE(market,'all') as mkt, MAX(id) as max_id
+                        FROM strategy_research WHERE COALESCE(period_tag,'2y')=?
+                        GROUP BY version, mkt) latest
+            ON sr.id = latest.max_id
+            ORDER BY sr.version
+        """, (period_tag,)).fetchall()
+    else:
+        # 默认：每个 (version, market) 组合取最新一条
+        rows = conn.execute("""
+            SELECT sr.* FROM strategy_research sr
+            INNER JOIN (SELECT version, COALESCE(market,'all') as mkt, MAX(id) as max_id
+                        FROM strategy_research GROUP BY version, COALESCE(market,'all')) latest
+            ON sr.id = latest.max_id
+            ORDER BY sr.version
+        """).fetchall()
     conn.close()
     out = []
     for r in rows: