Introductory Context
"This topic is conceptual -- it does not provide actionable retail trading strategies for instruments that are not available on NSE. Instead, it provides the intellectual framework that contextualises the options-based volatility strategies as retail approximations of the more precise institutional volatility instruments. "
Variance Swaps - The Pure Realised Volatility Instrument
A variance swap is an OTC (over-the-counter) derivative contract that pays the difference between the actual realised variance (the squared realised volatility) over a specified period and a pre-agreed variance strike. At maturity: payoff = Notional × (Realised Variance - Strike Variance). The 'buyer' of the variance swap profits if realised variance exceeds the strike variance (actual volatility was higher than expected). The 'seller' profits if realised variance is below the strike variance (actual volatility was lower than expected). No premium is exchanged at entry -- the payoff is purely based on the realised vs implied variance differential at settlement.
The variance swap's payoff is convex in volatility: since variance = volatility², a given absolute change in volatility produces a larger payoff for high-volatility scenarios than for low-volatility scenarios of equivalent magnitude. This convexity means variance swap buyers receive relatively more from large volatility spikes than the equivalent vega exposure from options positions.
Volatility Swaps - The Pure IV Instrument
A volatility swap is similar to a variance swap but settles on realised volatility directly (not its square). Payoff = Notional × (Realised Volatility - Strike Volatility). More intuitive to understand (linear in volatility rather than quadratic), but less commonly traded than variance swaps because the variance convexity is valuable to institutional hedgers who want to capture more of the volatility spikes.
VIX Futures - The Implied Volatility Futures Contract
VIX futures (available on the CBOE in the US) are futures contracts on the VIX index itself -- the market's forward implied volatility level. US-listed VIX futures allow traders to directly take long or short positions on the direction of implied volatility without any equity exposure. The VIX futures have their own term structure (typically in contango when VIX is low, meaning future VIX levels are priced above current VIX) that creates a structural roll cost for VIX futures holders similar to the theta cost for long options holders.
India-specific context: NSE does not offer VIX futures or options for retail traders as of this writing. The proposed India VIX futures contract has been discussed at NSE but has not been introduced. Retail traders in India must use options-based strategies (long straddles, short strangles, calendar spreads) as indirect VIX exposure instruments. The absence of direct VIX futures means Indian retail volatility traders cannot perfectly replicate the institutional variance swap payoff -- but the options-based instruments from Topics 18.7 and 18.8 provide reasonable approximations for most practical purposes.
Pure vs Approximate Volatility Instruments
Institutional: Variance swap (realised variance vs strike, convex payoff, no delta), Volatility swap (realised vol vs strike, linear payoff, no delta), VIX futures (implied vol futures, direct VIX exposure). Retail approximation on NSE: Long straddle (approximates long variance swap, but has delta and theta), Short straddle (approximates short variance swap, unlimited risk), Calendar spread (approximates long forward volatility, reduced delta from front-month short), Iron condor (bounded short variance exposure, defined risk). Key limitation: all retail options approximations involve delta, theta, and vega that must be managed together -- the pure instruments allow separating these exposures.
The VRP in Variance Swap Terms
The variance risk premium (VRP) is particularly well-studied in variance swap terms. In academic research: the strike variance (the price at which variance swaps trade) systematically exceeds the subsequent realised variance for major equity indices globally. The average annualised VRP for US equity indices: approximately 2 to 3 percentage points in variance terms. For Indian equity indices: the options market data suggests a similar or slightly larger VRP in variance terms, consistent with the implied-over-realised IV premium documented in Topic 18.1. This academic validation of the VRP in variance swap terms confirms that the options-based short volatility strategies' positive expected value is not a temporary anomaly -- it reflects a persistent structural premium that markets have been unable to arbitrage away.
Variance swaps and volatility derivatives are the institutional options world's equivalent of the retail trader's iron condor -- they are selling the gap between implied and realised volatility in its purest form. The retail trader cannot access variance swaps, but the option-selling income programme from Module 17 is the retail trader's best available approximation of the same structural VRP capture. Understanding what we are approximating provides the conviction to run the programme systematically -- the institutional market participants are running the same trade at a different scale.
Watch for NSE VIX Derivatives Introduction
NSE has periodically discussed introducing VIX futures and options for Indian retail traders, following the CBOE's successful VIX derivatives market in the US. If and when NSE introduces VIX futures, the entire Module 18 volatility framework would gain a direct implementation vehicle -- allowing pure VIX directional trades (long VIX futures when VIX is below the mean, short when above) without the options position's delta, theta, and gamma management requirements. Monitor NSE's product announcements at nseindia.com for updates on VIX derivative product launches.