
Understanding the true source of put‑buying drag unlocks a viable long‑volatility premium, offering portfolio managers a new source of diversification and risk‑adjusted return.
The long‑volatility premium has long been dismissed as a costly hedge, with many practitioners assuming that buying puts inevitably erodes portfolio returns. Kazley’s research challenges that narrative by separating the embedded short‑beta bet inherent in put positions from the pure volatility exposure. By applying winsorization to extreme observations and constructing a “benign beta” factor, the analysis isolates the true performance of a long‑volatility strategy, revealing that, when beta‑neutral, the factor generates a modest but consistent positive return.
Methodologically, the study mirrors traditional factor construction: it goes long the volatility exposure while simultaneously adjusting market exposure to achieve an ex‑ante beta of one. This approach allows the isolation of rebalancing premiums and the removal of market‑driven drag. The resulting factor series, stripped of the short‑beta component, demonstrates that the historical underperformance of put‑buying is not intrinsic to volatility but rather a misattribution to market exposure. The findings suggest that a well‑designed volatility overlay can act as a genuine source of alpha, comparable to value or momentum factors.
For practitioners, the implications are twofold. First, volatility can serve as a diversifier, injecting convexity and reducing tail risk without sacrificing overall return when beta is properly managed. Second, once a hedge is in place, managers can strategically re‑introduce risk—through leverage, alternative assets, or concentrated equity positions—to enhance return potential. This nuanced view positions tail hedging as a flexible tool rather than a pure cost, encouraging sophisticated portfolio designs that balance protection with opportunistic risk‑taking.
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