Volatility Risk Premium (VRP)

What is Volatility Risk Premium (VRP)?

Volatility Risk Premium (VRP) The Volatility Risk Premium (VRP) is the systematic difference between implied volatility and subsequent realized volatility, representing the premium that option buyers pay to option sellers for bearing the risk of adverse volatility moves. Historically, implied volatility exceeds realized volatility approximately 85% of the time, meaning options are usually priced above their fair actuarial value. This persistent premium is one of the most well-documented phenomena in financial markets. How it works: VRP arises because investors are willing to overpay for options as insurance against tail events. Just as homeowners pay insurance premiums that exceed the expected cost of claims, options buyers pay an implied volatility premium above the expected realized volatility. The VRP is calculated by subtracting realized volatility (measured after the fact) from the implied volatility that was priced at the start of the period. For the S&P 500, the long-term average VRP is roughly 3-5 percentage points, meaning if IV is 18%, realized vol tends to come in around 13-15%. For example, suppose SPY's 30-day implied volatility is 20% and you sell an ATM straddle collecting $8.00 in premium. Over the next 30 days, realized volatility comes in at 16%, and the straddle's actual cost to close is $6.20. Your profit of $1.80 represents the VRP you harvested. Over many trades, this edge compounds because IV systematically overestimates realized moves. However, during the 5-15% of periods where realized vol exceeds implied vol (market crashes, earnings surprises), losses can be severe. Option sellers exploit positive VRP through strategies like short strangles, iron condors, covered calls, and cash-secured puts. The key to sustainable VRP harvesting is risk management: sizing positions to survive the periods when realized vol spikes above IV, diversifying across tickers and expirations, and monitoring the current VRP level to avoid selling when the premium is unusually thin. Traders can measure VRP using IV rank, IV percentile, or direct comparisons of ATM IV to recent realized volatility.