diff --git a/handlers/dashboard.go b/handlers/dashboard.go
index c1839fb05d..ece52d5eea 100644
--- a/handlers/dashboard.go
+++ b/handlers/dashboard.go
@@ -988,7 +988,8 @@ func DashboardDataEffectiveness(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if len(activeValidators) == 0 {
-		http.Error(w, "Invalid query", http.StatusBadRequest)
+		// valid 200 response with empty data
+		w.Write([]byte(`{}`))
 		return
 	}
 
diff --git a/static/js/dashboard.js b/static/js/dashboard.js
index 4e6a4ed208..b22eb2e135 100644
--- a/static/js/dashboard.js
+++ b/static/js/dashboard.js
@@ -976,6 +976,9 @@ $(document).ready(function () {
         method: "GET",
       }).then((res) => {
         res.json().then((data) => {
+          if (Object.keys(data).length === 0) {
+            return
+          }
           let sum = 0.0
           for (let eff of data) {
             sum += eff