Margin Call Price Calculator

Buying on margin funds part of the purchase with a loan: at entry, the loan is EntryPrice × (1 − InitialMargin). At any later price P, your equity is just the position's value minus that loan, and a maintenance call fires once equity ÷ P falls to the maintenance margin requirement. Solving that equation for P gives the call price: CallPrice = EntryPrice × (1 − InitialMargin) ÷ (1 − MaintenanceMargin). Since the loan amount never changes, a falling price shrinks equity toward the loan until it trips the maintenance threshold.

A short sale works the opposite direction: selling short raises cash equal to EntryPrice, held alongside the deposited initial margin, while the liability is buying the shares back at whatever the current price P turns out to be. Equity is EntryPrice × (1 + InitialMargin) − P, and the same maintenance-margin condition solved for P gives CallPrice = EntryPrice × (1 + InitialMargin) ÷ (1 + MaintenanceMargin) — a short position gets called when the price rises, not falls.