Monetary

src/app/Rules/Monetary.php

@@ -25,7 +25,7 @@ class Monetary implements Rule
      */
     public function passes($attribute, $value)
     {
-        return preg_match('#^[0-9 ]+([.,][0-9]{1,2})?$#', $value) === 1;
+        return preg_match('#^-?[0-9 ]+([.,][0-9]{1,2})?$#', $value) === 1;
     }
 
     /**