react-openapi/src/components/fields/renderers/CurrencyField.tsx

@@ -15,7 +15,7 @@ export function formatCurrency(amount: number, currency?: string): string {
     });
     _currencyFormatters.set(code, formatter);
   }
-  return formatter.format(amount);
+  return formatter.format(Math.abs(amount));
 }
 
 interface CurrencyFieldProps {