WEBVTT

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One list contains three European call options with different expiries.

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Vector pricing should return the same three values as separate scalar calculations.

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But FinancePy 1.1.2 prices the six-month option at 17.5585. Its scalar value is 9.3021, also confirmed by an independent Black Scholes calculation.

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The loop calculates every expiry, but appends only once after finishing.

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The final two-year horizon is then broadcast across all three prices.

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Moving the append inside both loops restores every horizon.

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Vector prices then match scalar prices exactly, including vector strikes and mixed calls and puts.

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All 959 local unit tests and both upstream workflows pass.

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Restoring the old line fails the new regression.

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Pull request 258 remains open.

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Evidence at GERO dot U Z.

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Look at the mechanism.

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Check the evidence.

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Then decide.