MASI

Academic exercise. This note asks whether the market price is consistent with a defensible valuation range for the company. The reference price is the dated close shown above; the indicative value is a valuation estimate, not an execution target. The exercise is dated and falsifiable through the catalysts and risks below; it is not a recommendation and not investment advice. Dated academic exercise. The reference price is the closing price on the date shown; it is not a live quote and not an instruction to trade....

A full derivatives lab on real data: the SPX surface across six expiries (2,565 quotes, forwards from put-call parity, butterfly-constrained SVI, 0.03 vol-pt median cross-check against CBOE), BSM/binomial/Monte-Carlo pricing with convergence, an 85% variance cut from delta-gamma hedging, a 147-trade delta-hedged straddle check at VIX (+24.5% of premium, -$4,000 fifth-percentile tail), and a 6M 95% MASI put at 2.39% of notional.

The MASI lost 7.3% between its September high and its 8 October low, and nearly 10% year to date. This is not a crash: it is a correction that exposes the structure of a market that climbed on one leg — mining — with less and less liquidity, while the global cost of capital was changing regime. What happened, what it does not say, and what to watch.