What margin for this position?

Hello,

Please see the screenshot attached.

What would be the margin requirement in this case for backspread straddle?

Red arrows mean sold 10 contracts and green arrows mean bought 20 contracts. Both short legs are in the money.

$500 or $1000 margin?

 

Screen is here.

 

different brokers have different margin requirements.

ask your broker.

your question is similar to asking what gas mileage does my car get.

 

Interactive Brokers

 

What is maximum loss for this position?

 

This platform says 500. But IB maybe can req. more margin.

 

Margin req for a spread should be it's maximum loss. No matter how fancy it is.

http://individuals.interactivebrokers.com/en/index.php?f=marginnew&p=opt
(Select call spread or put spread)

One more thing: broker does not need you to allocate more cash than spread's maximum loss to be safe.
But you might need more than that to manage your loss.