Effective Gearing Explained
Effective gearing explained — how it differs from raw gearing, why it's the number that actually predicts a warrant's price move, with a worked calculation.
By warrants.asia Editorial Team · Published July 21, 2026
Gearing vs effective gearing
Gearing is the simplest leverage measure: the underlying's price divided by the warrant's price (adjusted for the entitlement ratio) — it tells you how many times cheaper the warrant is than owning the underlying outright. But raw gearing overstates real-world sensitivity, because it assumes the warrant moves point-for-point with the underlying, which it doesn't.
Effective gearing corrects for this by multiplying gearing by delta — the warrant's actual sensitivity to the underlying. A warrant with 10× gearing but a delta of 0.4 has an effective gearing of roughly 4×, meaning a 1% move in the underlying produces roughly a 4% move in the warrant, not 10%.
A worked effective gearing example
Take a call warrant with gearing of 8× and a delta of 0.5. Effective gearing ≈ 8 × 0.5 = 4×. If the underlying rises 2%, the warrant's price should rise by roughly 4 × 2% = 8% — a meaningful move, but far less than the 16% a trader might mistakenly expect by using raw gearing alone.
This is why comparing two warrants on the same underlying purely by their headline gearing number can be misleading — the one with lower raw gearing but higher delta may actually offer more real-world leverage.
Effective gearing changes as the warrant does
Because delta shifts as the underlying moves, as expiry approaches, and as implied volatility changes, effective gearing is not a fixed number — it needs to be re-checked, not assumed constant over the life of a position. A warrant bought with 4× effective gearing might carry a very different effective gearing weeks later after the underlying has moved and delta has shifted.
FAQ
What is effective gearing?
Effective gearing is a warrant's gearing multiplied by its delta — the more accurate estimate of how much a warrant's price actually moves for every 1% move in the underlying, compared to raw gearing alone.
Why isn't raw gearing enough?
Raw gearing assumes the warrant moves point-for-point with the underlying, which it doesn't — delta captures the warrant's actual sensitivity, so multiplying gearing by delta gives a far more realistic leverage estimate.
Does effective gearing stay constant?
No — because delta changes as the underlying moves and as expiry approaches, effective gearing shifts over the life of a warrant position and needs to be re-checked rather than assumed fixed.
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