MarketXLS Blog

Expert insights on stock market analysis, investment strategies, and Excel techniques for smarter investing.

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put spread calculator in Excel showing short put strike, long put strike, net credit, max loss, breakeven and days to expiry powered by MarketXLS formulas

Put spread calculator output looks like settled arithmetic, and the arithmetic is fine. What is missing is that the same payoff can be built from puts or from calls at identical strikes, that the two legs never share one volatility, and that only the put version can be assigned early. This build measures all three on a live chain.

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