Understand what a strategy actually does.
Volatility Street builds research infrastructure for systematic investment strategies: testing where returns come from, how exposure changes across market states, and where a strategy breaks.
Figure 1
Equity beta by market state, two illustrative strategies
- Strategy A reduces exposure as volatility rises
- Strategy B sells convexity; exposure grows as prices fall
Illustrative. State shares, volatilities and betas are assumptions, not estimates of any real strategy. Full-sample β is the variance-weighted average of the state betas, assuming zero state-conditional mean returns.
A strategy is more than a return series.
Returns show what happened. They do not show why the return should exist, what the strategy was exposed to, or where it should fail. We make those relationships explicit and testable.
Validation is designed to break a strategy, not to defend it.
- Mechanism
- State
- Policy
- Positions
- Exposure
- Outcomes
Index put-writing
Strategy record · illustrative
- Mechanism
- Investors pay a premium to insure against equity declines. The seller is compensated for bearing that crash risk.
- Instruments
- One-month at-the-money S&P 500 index puts, fully collateralized with Treasury bills.
- State
- Implied versus realized volatility; index drawdown; volatility term structure.
- Policy
- Sell one-month puts at each expiry and hold the collateral. No state conditioning.
- Exposure
- Equity beta rises as the index falls: small in rallies, largest in declines.
- Failure states
- Gap declines between roll dates; volatility spikes that reprice the premium; collateral strain in stress.
- Evidence to require
- Results by market state, not only in aggregate; losses in the worst episodes; comparison with equity held at a matched beta.
- Falsification
- The premium is persistently negative after costs over full cycles, or losses in declines exceed what it compensates.
A publicly documented strategy class, shown to illustrate the record. Not a client strategy and not a recommendation.
Research
- September 23, 2026A return series is not a strategyResearch methodology
- September 23, 2026What does beta mean when the policy changes with the state?Conditional exposure
- September 23, 2026Why selling volatility is not itself an edgeVolatility and derivatives structure
- March 26, 2026You skipped a stepStrategy mechanism
A strategy should be describable by the risk it earns, how it behaves and when it fails, not only by its historical returns.
Volatility Street is building the research infrastructure to make that description structured and comparable.
Volatility Street LLC is an independent quantitative research and technology company. Its work began in volatility and derivatives research.
Build the strategy. Make the evidence inspectable.
We work with investment managers on systematic research, validation, production artifacts and technical diligence.