Question 1

Why does a bigger position have a higher maintenance margin?

Accepted Answer

Exchanges use tiered (bracket) maintenance margin: the larger your position notional, the higher the maintenance margin rate they require, because large positions are harder to unwind without moving the market. Crossing into a higher bracket raises your maintenance margin rate, which pushes your liquidation price closer to entry even if leverage stays the same.

Question 2

How do margin tiers affect my liquidation price?

Accepted Answer

Liquidation happens when your margin falls to the maintenance requirement. A higher tier means a higher maintenance margin rate, so the price only has to move a little less against you before you are liquidated. Scaling a position up can therefore move your liquidation closer even though you added margin — the bracket bump can outweigh the extra collateral.

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