diff --git a/src/crossengine/result.py b/src/crossengine/result.py
index db0004d..ec57d7b 100644
--- a/src/crossengine/result.py
+++ b/src/crossengine/result.py
@@ -268,8 +268,9 @@ def _vlines(ax):
                 p_rebased = tv.loc[common] / tv.loc[common].iloc[0] * 100
                 b_rebased = bm_aligned.loc[common] / bm_aligned.loc[common].iloc[0] * 100
                 axes[5].plot(common, p_rebased, label="portfolio", linewidth=1.3, color="#2E5090")
-                axes[5].plot(common, b_rebased, label="SPX", linewidth=1,
-                             color="grey", linestyle="--", alpha=0.8)
+                bm_label = benchmark.name if benchmark.name else "benchmark"
+                axes[5].plot(common, b_rebased, label=bm_label, linewidth=1,
+                                     color="grey", linestyle="--", alpha=0.8)
                 axes[5].fill_between(common, p_rebased, b_rebased,
                                      where=p_rebased >= b_rebased, color="#27AE60", alpha=0.10)
                 axes[5].fill_between(common, p_rebased, b_rebased,