Implied vs. Realized Move Skew

Overview

This pillar analyzes the difference between the stock market's expected price swing for an earnings event and its historical average move. It helps identify when market expectations, priced into options, are overblown or underestimated.

What It Does

It calculates the implied move for a stock's upcoming earnings report using the price of an options straddle. This expected move is then compared against the average actual price move from the company's past 4 to 8 earnings reports. The resulting 'skew' indicates whether the market is pricing in more or less volatility than usual.

Why It Matters

This analysis provides a quantifiable edge by spotting mispricings in volatility expectations. If the market expects a huge move that rarely happens historically, there's an opportunity to position against that volatility. It transforms gut feelings about earnings into a data-driven trade.

How It Works

First, the pillar identifies the at-the-money options straddle (call plus put price) for the expiration right after the earnings date. This cost, as a percentage of the stock price, is the implied move. Second, it pulls historical data for the stock's price change the day after its last eight earnings calls. Finally, it compares the current implied move to the historical average realized move.

Methodology

Implied Move % = ((ATM Call Price + ATM Put Price) / Stock Price) * 100. Realized Move % = Average of the absolute percentage price change for the trading day following the last 8 earnings announcements. Skew = Implied Move % - Average Realized Move %.

Edge & Advantage

It provides a clear, numerical signal of whether market fear is justified by historical data, allowing for systematic positions against overvalued or undervalued volatility.

Key Indicators

• Straddle Breakeven %

  high

  The market's expected price move, calculated from options prices. This is the 'implied' part of the equation.

• Historical Earnings Volatility

  high

  The average absolute price move the stock has made following its past earnings announcements. This is the 'realized' part.

• IV Rank

  medium

  Current implied volatility level compared to its own 1-year high and low, providing context on whether options are cheap or expensive.

Data Sources

• Options Data Provider (e.g., CBOE)

  Provides near-real-time prices for call and put options needed to calculate the straddle cost.

• Historical Stock Data API (e.g., Yahoo Finance)

  Provides historical daily stock prices to calculate past earnings moves.

Example Questions This Pillar Answers

• → Will TSLA stock move more than 10.5% (up or down) the day after its Q3 earnings report?
• → Will the absolute price change for NVDA on the day after earnings be over or under 8.0%?
• → Will the price of AAPL close within a +/- 4.5% range the day following its Q4 earnings call?

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