Options field guide
Plain-language guides to earnings, implied volatility, option strategies, target prices, and time decay
331 guides
Understand why an option expiration date can differ from its last trading day, including AM or PM settlement, exercise cutoffs, holidays, pending orders, and contract checks.
Read guideUnderstand realized versus unrealized option profit and loss, including marks, actual fills, short premium, partial closes, rolling, exercise, assignment, expiration, and fees.
Read guideCalculate option return percentage using realized P&L and a stated denominator, including premium, maximum risk, collateral, stock value, fees, annualization, and open P&L.
Read guideUnderstand p-values, null hypotheses, test statistics, significance levels, Type I and Type II errors, power, effect size, optional stopping, data snooping, and financial interpretation
Read guideCompare GPD threshold exceedances with GEV block maxima, including data efficiency, bias–variance choices, dependence, return levels, and diagnostics for selecting an EVT method
Read guideCompare physically settled and cash-settled options by deliverable, settlement amount, assignment, expiration, multiplier, portfolio impact, and contract risk.
Read guideCompare costates and Hamiltonian maximization with value functions and dynamic programming in deterministic and stochastic financial control
Read guideLearn centering, scaling, covariance, component scores and loadings, explained variance, component selection, and the limits of PCA in finance.
Read guideLearn what propensity scores balance, why overlap and unconfoundedness matter, how matching and weighting change the estimand, and which diagnostics make a financial study credible.
Read guideCalculate protective put maximum loss, unlimited upside, married-put break-even, floor value, contract coverage, hedge cost, expiration, and basis choices.
Read guideUnderstand the long put calendar spread, strike and expiration choice, near-put assignment, maximum loss, uncertain break-even, theta, skew, rolling, and residual protection.
Read guideLearn the long put diagonal, strike and expiration choices, short-put assignment, remaining far-put hedge, rolling, volatility exposure, margin, break-even limits, and exits.
Read guideLearn the 1-by-2 put ratio spread payoff, maximum profit, debit and credit break-evens, substantial crash loss, Greeks, margin, and assignment risk.
Read guideLearn why squared path increments survive at fine scales, produce the Itô correction, and connect diffusion volatility with realized variance
Read guideLearn how the Radon–Nikodym derivative reweights probabilities, converts expectations, forms a density process, and supports risk-neutral valuation
Read guideCompare ratio spreads and backspreads by contract direction, payoff shape, volatility, time decay, tail risk, debit or credit, margin, and assignment.
Read guideUnderstand cutoff assignment, continuity, sharp and fuzzy RDD, local linear regression, bandwidth selection, manipulation diagnostics, and financial threshold applications.
Read guideLearn why identical payoffs imply identical prices, what self-financing means, and how discrete and continuous replication create option values
Read guideUnderstand reversal arbitrage using short stock, a long call, and a short put, with payoff math, stock-borrow costs, dividends, assignment, margin, and execution risk.
Read guideLearn bullish and bearish risk reversals, strike selection, expiration payoff, skew exposure, short-option assignment, margin, and why zero premium does not mean zero risk.
Read guideCompare risk reversal and collar option strategies by stock ownership, call and put direction, payoff, premium, assignment, downside protection, and upside limits.
Read guideCompare rolling a cash-secured put with assignment by effective share cost, cumulative premium, new strike, funding period, downside, and execution risk.
Read guideCompare rolling a covered call with accepting assignment by cumulative P&L, stock basis, new strike, time, dividends, downside, and execution risk.
Read guideUnderstand the saddlepoint equation, density and tail approximations, exponential tilting, option-pricing uses, and the numerical checks that matter
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