diff --git a/backend/routers/causal_lab.py b/backend/routers/causal_lab.py
index d5a40bd..d956407 100644
--- a/backend/routers/causal_lab.py
+++ b/backend/routers/causal_lab.py
@@ -984,6 +984,9 @@ def analyze_event(body: AnalyzeRequest):
             "SELECT id FROM causal_event_analyses WHERE market_event_id=? AND template_id=?",
             (body.market_event_id, body.template_id),
         ).fetchone()
+        # Stocker tous les instruments analysés pour que la frise Instrument Analysis les retrouve
+        all_instruments_csv = ",".join(sorted(drift_by_inst.keys())) or primary_inst
+
         if existing:
             conn.execute("""
                 UPDATE causal_event_analyses
@@ -991,7 +994,7 @@ def analyze_event(body: AnalyzeRequest):
                     actual_json=?, activation_score=?, drift_json=?, analyzed_at=?
                 WHERE market_event_id=? AND template_id=?
             """, (
-                primary_inst, json.dumps(inputs), json.dumps(body.coef_overrides),
+                all_instruments_csv, json.dumps(inputs), json.dumps(body.coef_overrides),
                 json.dumps(node_values), json.dumps(actual_moves), activation.get("score"),
                 json.dumps(drift_by_inst), analyzed_at,
                 body.market_event_id, body.template_id,
@@ -1004,7 +1007,7 @@ def analyze_event(body: AnalyzeRequest):
                      activation_score, drift_json, analyzed_at)
                 VALUES (?,?,?,?,?,?,?,?,?,?)
             """, (
-                body.market_event_id, body.template_id, primary_inst,
+                body.market_event_id, body.template_id, all_instruments_csv,
                 json.dumps(inputs), json.dumps(body.coef_overrides),
                 json.dumps(node_values), json.dumps(actual_moves),
                 activation.get("score"),