Stock Margin Loan Calculator

Estimate leveraged stock return after margin interest, fees, taxes, and downside shock.

Stock margin loan calculator

Estimate loan amount, interest, collateral ratio, liquidation trigger price, and equity return for a Korean stock margin scenario.

Loan amount

₩30,000,000

Total interest

₩221,918

Collateral ratio

156.7%

Liquidation trigger price

₩42,000

Current profit

-₩3,221,918

Equity return

-16.1%

Required extra collateral

₩0

Leverage

2.5x

The stock-margin lib preserves interest by holding days, collateral ratio, 140 percent default maintenance ratio, liquidation trigger, and securities transaction tax in break-even price. This English finance calculator uses the Korean feature lib for the displayed numeric result. KRW is used for money inputs and outputs in this batch, fixing the old P2 USD scenario stub for these pages.

Related calculators

Stock margin loan calculator

This English guide translates the Korean stock margin loan calculator for loan amount, daily interest, collateral ratio, liquidation trigger price, required extra collateral, break-even price, and equity return.

Loan and interest

The Korean calculator determines total purchase amount, investor equity, loan amount, leverage, daily interest, and total interest from buy price, share count, margin requirement, annual interest rate, and holding days.

Interest is calculated by days held, not by a fixed monthly shortcut. This matters because short-term margin trades can still lose money when interest and transaction tax are added to a small price move.

Collateral ratio and liquidation

The default maintenance ratio is 140 percent, and the result shows current collateral ratio, status, liquidation trigger price, drop room from current price, and required extra collateral. A collateral ratio below the maintenance ratio indicates forced-sale risk.

The break-even price also includes securities transaction tax. The constants preserve a 0.15 percent securities transaction tax assumption in the stock-margin lib, so the answer is more specific than a simple leveraged price change.

Risk interpretation

Margin magnifies both gains and losses. The same stock move produces a larger equity return because the investor uses borrowed money, but falling price also reduces collateral ratio and can trigger additional collateral or liquidation.

Use this page to stress-test a position before borrowing. Broker rules, maintenance margin, interest schedule, and liquidation procedures vary, so the result should be compared with the actual broker agreement.