It depends.
With futures, you can't lose more than the value of the contracts you hold. The ES is at 1148 so the most you can lose with one contract if the ES went to zero is $57,400. Which is insane but it's the worst possible event.
If you had 60 grand in an account and the ES went to zero, you would blowup (at that point maybe even literally) but you wouldn't owe.
Alot of people trade many more contracts with much less than that, so if the broker dropped the ball during a dive, you could definitely be stuck with the bill.
Anytime I hear of somebody doing 20% days, I think back to my good old days of crazy leverage, which came of course before the bad old days.
With futures, you can't lose more than the value of the contracts you hold. The ES is at 1148 so the most you can lose with one contract if the ES went to zero is $57,400. Which is insane but it's the worst possible event.
If you had 60 grand in an account and the ES went to zero, you would blowup (at that point maybe even literally) but you wouldn't owe.

Alot of people trade many more contracts with much less than that, so if the broker dropped the ball during a dive, you could definitely be stuck with the bill.
Anytime I hear of somebody doing 20% days, I think back to my good old days of crazy leverage, which came of course before the bad old days.