From 3fe7eedf0fd88b68f39eecbc6c92d8bd5530edd4 Mon Sep 17 00:00:00 2001
From: LouisLetcher <36189959+LouisLetcher@users.noreply.github.com>
Date: Thu, 5 Feb 2026 12:17:38 +0100
Subject: [PATCH] fix: return DataFrame without resetting index in
 _normalize_data method

---
 src/backtest/runner.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backtest/runner.py b/src/backtest/runner.py
index bde3a41..e6e8233 100644
--- a/src/backtest/runner.py
+++ b/src/backtest/runner.py
@@ -229,7 +229,7 @@ def _prepare_pybroker_frame(
         if missing_cols:
             raise ValueError(f"Missing required columns after normalization: {missing_cols}")
         ordered = pd.DataFrame({col: working[col].to_numpy() for col in ordered_cols})
-        return ordered.reset_index(drop=True), dates
+        return ordered, dates
 
     def _compute_cagr(
         self,