diff --git a/src/ofxstatement/parser.py b/src/ofxstatement/parser.py
index 387b050..1ef47d6 100644
--- a/src/ofxstatement/parser.py
+++ b/src/ofxstatement/parser.py
@@ -57,7 +57,9 @@ def parse_record(self, line: LT) -> Optional[StatementLine]:  # pragma: no cover
         """Parse given transaction line and return StatementLine object"""
         raise NotImplementedError
 
-    def parse_invest_record (self, line: LT) -> Optional[InvestStatementLine]:  # pragma: no cover
+    def parse_invest_record(
+        self, line: LT
+    ) -> Optional[InvestStatementLine]:  # pragma: no cover
         """Parse given investement transaction line and return InvetStatementLine object"""
         raise NotImplementedError