diff --git a/crates/fidc-core/src/platform_expr_strategy.rs b/crates/fidc-core/src/platform_expr_strategy.rs
index 18753a9..e411e89 100644
--- a/crates/fidc-core/src/platform_expr_strategy.rs
+++ b/crates/fidc-core/src/platform_expr_strategy.rs
@@ -770,7 +770,10 @@ fn precomputed_stock_current_rolling_mean(
     };
     match field.trim().to_ascii_lowercase().as_str() {
         "close" | "prev_close" | "stock_close" | "price" => {
-            value_for(&format!("ma{lookback}_current_close"))
+            // `rolling_mean_current("close", ...)` uses the framework's
+            // back-adjusted close series. Source Lake `maN_current_close` is
+            // calculated from raw close and is therefore not interchangeable.
+            value_for(&format!("ma{lookback}_current_back_adjusted_close"))
         }
         "volume" | "stock_volume" => value_for(&format!("avg_volume{lookback}_current")),
         _ => None,
@@ -787,6 +790,7 @@ fn is_precomputed_stock_current_rolling_key(key: &str) -> bool {
     }
 
     has_numeric_window(key, "ma", "_current_close")
+        || has_numeric_window(key, "ma", "_current_back_adjusted_close")
         || has_numeric_window(key, "avg_volume", "_current")
 }
 
@@ -28590,6 +28594,7 @@ mod tests {
         extra_factors.insert("ma30_prev_close".to_string(), 97.0);
         extra_factors.insert("avg_volume5".to_string(), 88.0);
         extra_factors.insert("avg_volume100".to_string(), 99.0);
+        extra_factors.insert("ma5_current_close".to_string(), 999.0);
         extra_factors.insert("adjustment_factor_backward1".to_string(), 1.0);
         let data = DataSet::from_components(
             vec![Instrument {
@@ -28795,7 +28800,10 @@ mod tests {
                     effective_turnover_ratio: None,
                     extra_factors: BTreeMap::from([
                         ("adjustment_factor_backward1".to_string(), 1.0),
-                        ("ma5_current_close".to_string(), current_close),
+                        (
+                            "ma5_current_back_adjusted_close".to_string(),
+                            current_close,
+                        ),
                         ("avg_volume5_current".to_string(), current_volume),
                     ]),
                 },