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Debit spread vs. credit spread
Understand debit and credit spreads, the decision it supports, and the pricing and execution risks to check before acting
Prepared by Mark · Primary sources below
Direct answer
A debit spread costs net premium to open and usually needs the spread value to rise, while a credit spread receives net premium and usually benefits when the spread value falls or expires within its intended range. Debit or credit describes cash flow, not whether the outlook is bullish or bearish. Both structures can define maximum gain and loss when the legs share an expiration and quantity, but their break-even, theta, assignment exposure, and ideal price path differ.
Debit and credit spreads: the core structure
A debit spread costs net premium to open and usually needs the spread value to rise, while a credit spread receives net premium and usually benefits when the spread value falls or expires within its intended range. Debit or credit describes cash flow, not whether the outlook is bullish or bearish.
Debit and credit spreads: the variables to compare
Both structures can define maximum gain and loss when the legs share an expiration and quantity, but their break-even, theta, assignment exposure, and ideal price path differ. Compare strike width, net premium, reward relative to loss, liquidity of both legs, and the exact expiration payoff.
Debit and credit spreads: the risk that remains
The opening credit is not maximum profit until the obligation is resolved, and a smaller debit can still lose completely. Model early exits as well as expiration, include fees and slippage for every leg, and plan how to respond if the short leg approaches assignment.
Common questions
What does debit and credit spreads help explain?
A debit spread costs net premium to open and usually needs the spread value to rise, while a credit spread receives net premium and usually benefits when the spread value falls or expires within its intended range. Debit or credit describes cash flow, not whether the outlook is bullish or bearish.
What should I check before using debit and credit spreads?
Both structures can define maximum gain and loss when the legs share an expiration and quantity, but their break-even, theta, assignment exposure, and ideal price path differ. Compare strike width, net premium, reward relative to loss, liquidity of both legs, and the exact expiration payoff. The opening credit is not maximum profit until the obligation is resolved, and a smaller debit can still lose completely. Model early exits as well as expiration, include fees and slippage for every leg, and plan how to respond if the short leg approaches assignment.
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