How are market conditions like TSR targets treated in stock option valuation?

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AcadiFi · Accepted Answer

Market conditions are vesting conditions tied to the share price itself or relative stock performance (Total Shareholder Return vs. a peer index, share price thresholds). Crucially, market conditions are embedded in the GRANT-DATE FAIR VALUE using a Monte Carlo or lattice model, and expense is NEVER reversed if the condition fails. Example: Tessellate Cloud grants 50,000 TSR-linked options. Without the TSR hurdle, a plain option would be worth $12. A Monte Carlo simulation across 10,000 paths estimates that the TSR condition is met in 62% of paths, yielding a probability-adjusted fair value of $7.44 per option. Total grant-date fair value = $372,000. This $372,000 is straight-lined (cliff) or accelerated (graded) over the service period. Even if the stock tanks and the TSR hurdle is missed, the $372,000 expense remains fully recognized. ```mermaid flowchart TD A[Grant Date] --> B{Condition} B -->|Market| C[Fair Value
adjusted] B -->|Performance| D[Probability
estimate] C --> E[No reversal] D --> F[Reverse if miss] ``` Exam trap: candidates often confuse the two. Rule of thumb — if it involves the stock price or peer index, it's a market condition (fair-value adjustment, no true-up). If it involves accounting metrics (revenue, EPS, ROIC), it's a non-market performance condition (probability-weighted, trued up).

How are market conditions like TSR targets treated in stock option valuation?

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