^GSPC$7,423.20+0.56%^IXIC$25,009.60+1.04%^DJI$42,502.91-0.16%^VIX$27.32+2.05%^STOXX50E$67.27+0.73%BTC-USD$79,600.39-1.10%ETH-USD$2,257.18-0.75%SOL-USD$90.98-3.49%AAPL$298.95+1.41%MSFT$405.09-0.66%NVDA$225.86+2.30%TSLA$445.21+2.71%META$616.61+2.26%GOOGL$402.64+3.95%AMZN$270.15+1.63%AMD$445.40-0.64%EURUSD$1.1709-0.27%GC$4,686.94-0.60%CL$101.27-1.72%^GSPC$7,423.20+0.56%^IXIC$25,009.60+1.04%^DJI$42,502.91-0.16%^VIX$27.32+2.05%^STOXX50E$67.27+0.73%BTC-USD$79,600.39-1.10%ETH-USD$2,257.18-0.75%SOL-USD$90.98-3.49%AAPL$298.95+1.41%MSFT$405.09-0.66%NVDA$225.86+2.30%TSLA$445.21+2.71%META$616.61+2.26%GOOGL$402.64+3.95%AMZN$270.15+1.63%AMD$445.40-0.64%EURUSD$1.1709-0.27%GC$4,686.94-0.60%CL$101.27-1.72%
RockstarMarkets
All glossary
Options

Open interest

The total number of outstanding option or futures contracts.

What it means

Open interest is the count of contracts that have been opened but not yet closed or expired. Distinct from volume, which counts the day's trades. Rising OI with rising price = new bullish positioning; rising OI with falling price = new bearish positioning.

Why it matters

OI distinguishes new positioning from churn. A 50%-volume day on flat OI tells a very different story from a 50%-volume day on +30% OI.

How to use it

Pair OI with price and volume to read positioning shifts. In options, watch OI build at specific strikes - large concentrations create gamma walls and pin risk.

Take it further

Want a worked example or a deeper dive? Ask Rocky how this concept applies to your specific watchlist or trade idea.

Ask Rocky