Glossary A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 1 | 3 | 4 | 5 Definitions by InvestorWords.com   What is...? Margin buying power for marginable securities Margin Buying Power for Marginable Securities is the total dollar amount available to purchase marginable securities. Any portion of this amount above and beyond your Cash Available for Investment will be on Margin. You will be charged interest for this portion that you have borrowed from E*TRADE. The amount you can borrow is based on the value of the cash and securities you currently have in your account. Margin Buying Power for Marginable Securities reflects the Federal Reserve requirement of 50% and E*TRADE Securities' minimum house Margin Maintenance Requirement. Margin Buying Power for Marginable Securities is based on the previous day's closing prices when is then reduced by any open orders. The value is reduced or increased as soon as the trade executes, not when the trade settles. All buy trades are debited (subtracted) and all sell trades are credited (added). The values from non-trading activity, such as withdrawals will impact the margin buying power. The full buying power may not be available for certain stocks which have higher margin requirements. Note: This value does not guarantee that securities purchased up to this value will not lead to a margin call. If the value of the securities in your account goes down, you can find yourself at risk for or placed in a margin call. Margin calls are serious situations which require your immediate attention-as E*TRADE Securities can liquidate securities in your account to cover them. Note: For pattern day traders, this is the amount available for holding marginable securities overnight without getting into a fed call. Source: E*TRADE FINANCIAL Copyright ©2009 by InvestorGuide.com. All Rights Reserved.