Open Interest Analysis

Open Interest (OI) represents the total number of outstanding derivative contracts (options or futures) that have not been settled. Unlike volume, which counts the total number of trades for the day, OI increases when new contracts are created and decreases when contracts are closed. It is a direct measure of the money flowing into (or out of) specific price levels.

• Support & Resistance: High OI at a specific "strike price" acts as a magnet or barrier. Market makers often hedge their positions around these high OI levels, creating natural support or resistance zones.
• Trend Strength: Rising price combined with rising OI indicates "new money" is entering to support the trend (Bullish). Rising price with *falling* OI indicates traders are closing positions, suggesting the move is running out of fuel (Bearish divergence).
• Institutional Positioning: Large, concentrated build-ups in OI reveal where institutional traders have placed their "bets" for expiry, making these levels critical for strategic planning.

When analyzing an options chain, look for the "Max Pain" point or the strike price with the highest call/put OI. These levels often act as "anchors" for the price. If the price breaks through a massive OI wall, it frequently triggers "short-covering" or "long-liquidation" rallies, creating explosive volatility.