Hi- I spend only a few weeks in NYSE trading and have a question as a beginner. For example, if my BUY order of 100 MSFT is executed on Monday, then I know I am a REAL owner of MSFT on Thursday. Also my SELL order is executed in Tuesday, then I am out of MSFT Friday. Now, Suppose MSFT and BAC is just $1 per share, and I like to SELL 100 shares of MSFT and BUY 100 shares of BAC together on Monday. Rather than holding $100(full payment) by brokerage company for 100 BAC, I like brokerage to hold 30% or 40% ($40) so that I can trade more quantity. Please note that this is NOT margin trading. As a beginner with just Etrade account, I guess this is NOT possible in Etrade. Is there any other brokerage company to allow this kind of MORE TRADING VOLUME? -Jay (Forgive me for my possible English error)