1 files changed, 9 insertions, 2 deletions
diff --git a/openbb_platform/core/openbb_core/provider/standard_models/etf_performance.py b/openbb_platform/core/openbb_core/provider/standard_models/etf_performance.py
index 6fda6f7bea2..06eeb6c257b 100644
--- a/openbb_platform/core/openbb_core/provider/standard_models/etf_performance.py
+++ b/openbb_platform/core/openbb_core/provider/standard_models/etf_performance.py
@@ -1,8 +1,9 @@
 """ETF Performance Standard Model."""
 
 from datetime import date as dateType
+from typing import Literal, Optional
 
-from pydantic import Field
+from pydantic import Field, field_validator
 
 from openbb_core.provider.abstract.data import Data
 from openbb_core.provider.abstract.query_params import QueryParams
@@ -15,7 +16,7 @@ from openbb_core.provider.utils.descriptions import (
 class ETFPerformanceQueryParams(QueryParams):
     """ETF Performance Query."""
 
-    sort: str = Field(
+    sort: Literal["asc", "desc"] = Field(
         default="desc",
         description="Sort order. Possible values: 'asc', 'desc'. Default: 'desc'.",
     )
@@ -24,6 +25,12 @@ class ETFPerformanceQueryParams(QueryParams):
         description=QUERY_DESCRIPTIONS.get("limit", ""),
     )
 
+    @field_validator("sort", mode="before", check_fields=False)
+    @classmethod
+    def to_lower(cls, v: Optional[str]) -> Optional[str]:
+        """Convert field to lowercase."""
+        return v.lower() if v else v
+
 
 class ETFPerformanceData(Data):
     """ETF Performance Data."""