1 files changed, 10 insertions, 4 deletions
diff --git a/openbb_platform/core/openbb_core/provider/standard_models/income_statement_growth.py b/openbb_platform/core/openbb_core/provider/standard_models/income_statement_growth.py
index c324da6c31e..31fa068f7bc 100644
--- a/openbb_platform/core/openbb_core/provider/standard_models/income_statement_growth.py
+++ b/openbb_platform/core/openbb_core/provider/standard_models/income_statement_growth.py
@@ -24,10 +24,16 @@ class IncomeStatementGrowthQueryParams(QueryParams):
 
     @field_validator("symbol", mode="before", check_fields=False)
     @classmethod
-    def upper_symbol(cls, v: str) -> str:
-        """Convert symbol to uppercase."""
+    def to_upper(cls, v: str) -> str:
+        """Convert field to uppercase."""
         return v.upper()
 
+    @field_validator("period", 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 IncomeStatementGrowthData(Data):
     """Income Statement Growth Data."""
@@ -110,8 +116,8 @@ class IncomeStatementGrowthData(Data):
 
     @field_validator("symbol", mode="before", check_fields=False)
     @classmethod
-    def upper_symbol(cls, v: Union[str, List[str], Set[str]]):
-        """Convert symbol to uppercase."""
+    def to_upper(cls, v: Union[str, List[str], Set[str]]):
+        """Convert field to uppercase."""
         if isinstance(v, str):
             return v.upper()
         return ",".join([symbol.upper() for symbol in list(v)]) if v else None