Quote from wizardx:
If this is true, then how does this relate to the maintenance margin call?
Say you currently have 2:1 leverage in your account. Your positions move against you so leverage becomes higher than 2:1. As I understand the way maintenance calls work, you will not get a margin call or have your trades liquidated until you reach the maintenance margin. However, based on the above, your positions will be liquidated as long as you go above 2:1.
I'm not trying to sound like I know everything about this industry, but you could probably tell which department I work in on the street. You're confusing the 2 requirements.
Maintenance requirement is different from Reg-T initial requirement. 2 to 1 applies to the latter. You're required to deposit 50% of the initial purchase amount by the third day after the trade (T+3).
Once you place the trade though, the ratios are based on your debit balance, the amount you are actually borrowing in cash. You are given some leeway for the stock to fluctuate. The minimum brokers are required to maintain is 25% of the value, though most hold more such as 30%.
Using the Ebay example above:
You bought $40,000 but had exactly $20,000 in cash, enough to hold it overnight. (Say 950 shares at $42.10) Regardless of what the stock closes at, you had the required amount for the initial purchase. You are also borrowing $20,000.
If your firm's maintenance requirement for Ebay is 30%, the value of the Ebay position has to drop below $28,571 before you will have a maintenance call and have to worry about liquidation. This comes out to around 30.07 a share. An easy calculation is Debit Balance ($20K) divided by 70%. This gives you the loan value of the security of $20,000, which is how much you're already borrowing.
If you bought $80,000 and sold it the same day, you are fine. If you held it overnight, you need to deposit $20,000. It doesn't matter what the stock closes at today, tomorrow, or the fifth day as far as the $20,000 is concerned. It will not change.