diff --git a/qlib/backtest/decision.py b/qlib/backtest/decision.py
index 042b73fea..4cef6062c 100644
--- a/qlib/backtest/decision.py
+++ b/qlib/backtest/decision.py
@@ -301,7 +301,7 @@ class TradeRangeByTime(TradeRange):
 
 class BaseTradeDecision(Generic[DecisionType]):
     """
-    Trade decisions ara made by strategy and executed by executor
+    Trade decisions are made by strategy and executed by executor
 
     Motivation:
         Here are several typical scenarios for `BaseTradeDecision`
diff --git a/qlib/utils/index_data.py b/qlib/utils/index_data.py
index ea935dcaa..b62bc02ce 100644
--- a/qlib/utils/index_data.py
+++ b/qlib/utils/index_data.py
@@ -2,7 +2,7 @@
 # Licensed under the MIT License.
 """
 Motivation of index_data
-- Pandas has a lot of user-friendly interfaces. However, integrating too much features in a single tool bring to much overhead and makes it much slower than numpy.
+- Pandas has a lot of user-friendly interfaces. However, integrating too much features in a single tool bring too much overhead and makes it much slower than numpy.
     Some users just want a simple numpy dataframe with indices and don't want such a complicated tools.
     Such users are the target of `index_data`