handle inf (#4888)

openbb_terminal/helper_funcs.py

@@ -821,6 +821,9 @@ def us_market_holidays(years) -> list:
 def lambda_long_number_format(num, round_decimal=3) -> Union[str, int, float]:
     """Format a long number."""
 
+    if num == float("inf"):
+        return "inf"
+
     if isinstance(num, float):
         magnitude = 0
         while abs(num) >= 1000: