Options — Strategy — By The Books

Doctrine — The Book

The Unlucky Investor's Guide to Options Trading

Julia Spina

A quantitative, probability-first framework for options. Not prediction, but statistics. Core idea: options sellers have a structural edge because implied volatility — what the market charges for options — consistently overestimates realized volatility — what actually happens. You are paid to take the other side of fear.

IV Rank and IV Percentile as the primary entry filter — only sell premium when implied volatility is elevated relative to its own history; only buy when it is historically cheap. Without this filter, you are trading blind.
Theta as the edge — time value decays at an accelerating rate as expiration approaches; sellers collect this decay as profit each day a position is held open
Defined and undefined-risk positions on liquid ETFs — spreads (iron condors, verticals) cap the maximum loss structurally; strangles and straddles on SPY/QQQ/IWM carry theoretically unlimited max loss, but actual exposure is bounded by mechanical position sizing: 2% of allocated capital is the maximum risk per trade, enforced at entry. Undefined risk does not mean unmanaged risk.
The 21 DTE / 50% profit rule — close or manage the position at 21 days-to-expiration OR when 50% of maximum profit is captured, whichever comes first; this locks in most of the available theta while avoiding the dangerous gamma spike that occurs near expiration
Never hold through expiration — gamma (rate of change of delta) spikes sharply in the final weeks; the reward for the last 50% of profit rarely justifies the pin risk and directional exposure that comes with it
Position sizing by notional exposure — ETF underlyings (SPY, QQQ, IWM) are highly correlated; concentrated positions across these are not diversified, so each position is sized to keep total notional exposure bounded

Detectors

High IV — Sell Premium

Elevated implied volatility relative to its own history creates attractive premiums for sellers. Structural edge is highest here.

IV Rank ≥ 70

Low IV — Buy Premium

Cheap implied volatility favors debit spreads and directional long options where the cost of entry is low relative to potential move.

IV Rank ≤ 30

IV Crush

Event-driven volatility spike followed by expected collapse — earnings, FOMC — where the implied move price is likely to be a significant overestimate.

Post-event IV compression

Theta Decay

Moderate IV with a favorable days-to-expiration range for steady time-decay collection without requiring a large directional move.

Moderate IV · target DTE range

Risk Management

Position sizing as the primary risk control — defined-risk spreads (iron condors, verticals) are used when IV is very high; probability-based undefined-risk positions (strangles, straddles) are used on liquid ETF underlyings when IV is moderate-elevated; in both cases 2% of allocated ETF capital is the maximum risk per trade, enforced mechanically at entry

21 DTE exit — all positions are closed at or before 21 days-to-expiration to avoid the dangerous gamma environment near expiration

50% profit exit — positions are closed when 50% of maximum possible profit is captured, whichever comes first vs the 21 DTE rule; this locks in most of the edge and frees capital

IV Rank and IV Percentile pre-calculated daily — no manual IV reading required; the system surfaces only setups where the IV environment supports the trade direction

No discretionary overrides — management rules are mechanical; positions are not held beyond their exit triggers on hope