After hours trading - is margin buy power updated real time ?

[fijah93852]

For example - bank of america stock close price - 10 dollars

If i trade during after horus trading and bofa stocks up to 14 dollars my buy power will also up ?

 

[sprstpd]

For example - bank of america stock close price - 10 dollars

If i trade during after horus trading and bofa stocks up to 14 dollars my buy power will also up ?

I don't think that is right but what the hell do I know? My feeling is that since after hours trading is so illiquid that erroneous prints could cause huge swings in margin which brokerages would probably try and avoid. I have no idea - you're welcome for me not answering your question.