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Trading Options at Expiration: Strategies and Models for Winning the Endgame

by Jeff Augen (2009)

Quick summary -- an in-depth PhD-level extended summary (10-30 pages) for this book is coming soon.

Trading Options at Expiration: Strategies and Models for Winning the Endgame

by Jeff Augen

Overview

Published in 2009 by FT Press, this book focuses exclusively on options trading during the final days before expiration, a period when traditional options pricing models break down and significant price distortions emerge. Jeff Augen, a former IBM executive turned quantitative options trader, leverages minute-by-minute data analysis to identify and exploit these anomalies.

Core Thesis

The days preceding options expiration represent a unique window of opportunity. During this period, three primary forces distort option prices in predictable ways: implied volatility collapse, strike price pinning effects, and accelerated time decay. These forces create mispricings that can be exploited by traders who understand the underlying mathematics, independent of market direction or fundamental analysis.

Expiration Pricing Dynamics

The book's first chapter establishes the theoretical foundation:

  • Implied Volatility Collapse: As expiration approaches, implied volatility drops precipitously, creating price distortions of 30% on expiration Thursday and up to 100% on Friday for at-the-money options. This collapse is the primary profit driver for many expiration strategies.

  • Strike Price Effects (Pinning): Heavily traded optionable stocks tend to gravitate toward nearby strike prices as institutional investors unwind complex hedging positions. This "gravitational pull" creates predictable price behavior that can be quantified and traded.

  • Time Decay Acceleration: Theta decay accelerates exponentially in the final hours before expiration, creating opportunities for strategies that harvest this premium.

Statistical Models

Chapter 2 develops statistical frameworks for selecting trade candidates and timing entries. Augen analyzes different "populations" of expiration behavior across multiple stocks and expirations, identifying which stocks consistently exhibit pinning effects, how frequently strike price crosses occur, and the probability distributions of various outcomes. The analysis uses stocks like Apple, Google, MasterCard, and Research in Motion as case studies.

Day Trading Strategies

The practical core of the book covers specific trading structures:

  • Expiration Thursday strategies: Long straddles purchased when stocks cross strike prices during midday stability windows; ratio spreads that profit from both directional moves and volatility collapse.

  • Overnight trades (Thursday-Friday): Positions designed to capture overnight implied volatility collapse.

  • Expiration Friday strategies: Pure premium-selling strategies late in the day when accelerated decay makes naked short positions safer; delta-neutral ratio trades.

Risk Management

Augen emphasizes that expiration trading requires specific risk management approaches. Collateral requirements for naked short positions are explained in detail, including the standard formula (100% of option proceeds + 20% of underlying - out-of-the-money adjustment). Pattern day trading rules and their implications for expiration strategies are discussed.

Technical Requirements

The book requires above-average mathematical sophistication. Augen provides Excel VBA code for counting strike price crosses and encourages readers to build custom databases using minute-by-minute data from vendors like Tick Data. The analytical framework assumes access to quality historical data and basic programming capability.