Vanna-Charm Flow Predictor

Overview

Analyzes second-order options greeks, Vanna and Charm, to forecast dealer hedging flows around options expiration (OPEX). This provides a powerful signal for short-term price movements in major indices and assets.

What It Does

This pillar aggregates Vanna and Charm exposures across the entire options chain for a specific asset, like the S&P 500. It calculates the net potential buy or sell pressure from market makers as they adjust their hedges due to changes in volatility and time decay. The model focuses on the critical window leading into monthly and quarterly OPEX, revealing hidden market forces.

Why It Matters

Dealer hedging is a massive, non-discretionary force in the market that can dictate price action. By quantifying these flows in advance, this pillar identifies price levels that will act as magnets or repellants, offering a significant edge in predicting short-term price ranges and volatility.

How It Works

First, the model scans all active options contracts for a given underlying asset. It then calculates the Vanna and Charm values for each contract and aggregates them based on assumed dealer positioning. Finally, it translates these exposures into an estimated dollar amount of buying or selling pressure per day or per volatility point.

Methodology

Calculates Net Vanna Exposure by summing the Vanna of each options strike multiplied by its open interest. A similar calculation is used for Net Charm Exposure. The model focuses on the 5-day window leading into major options expiration dates to estimate the peak hedging impact on the underlying asset's price.

Edge & Advantage

Most retail analysis stops at Gamma. This pillar provides an edge by modeling the powerful, second-order flows that drive market maker behavior and often explain otherwise confusing price action near expiration.

Key Indicators

• Net Vanna Exposure

  high

  Measures the total market sensitivity to changes in implied volatility, indicating potential buy/sell pressure if volatility rises or falls.

• Charm Decay Flow Estimate

  high

  Quantifies the expected daily buy/sell pressure from time decay as options near expiration, often creating price 'pinning' effects.

• OPEX Window Flow

  medium

  Aggregates the combined Vanna and Charm flows expected during the week of options expiration to identify key support or resistance levels.

Data Sources

• Options Data Providers (e.g., Spotgamma, OptionMetrics)

  Specialized services that pre-calculate and aggregate Greek exposures, including Vanna and Charm, across major assets.

• CBOE / Exchange Data

  Provides the raw options open interest, volume, and pricing data needed for the underlying calculations.

Example Questions This Pillar Answers

• → Will the S&P 500 be pinned near the 5200 strike price at this Friday's options expiration?
• → Is there significant dealer selling pressure on BTC if implied volatility drops by 5% this week?
• → Will there be a 'Vanna rally' in the Nasdaq 100 if volatility continues to fall into OPEX?

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