What is the film with the biggest difference in budget and how much it earnt?

Basically what I'm asking is what film has the largest difference in how much it spent on the film as to how much it earnt?





This can be small budget to high earnings, or high budget to small earnings.|||Blair Witch Project broke the record for most made compared to the cost of it. But I think (I'm not 100% sure on this though) that Paranormal Activity did better and broke the record again.