Home / Ideas / Defensive Factor Switch (Low-Vol vs High-Beta)
Defensive Factor Switch (Low-Vol vs High-Beta)
ride high-beta in calm markets, hide in low-vol when volatility spikes
Low-vol and high-beta are the two ends of the same volatility factor and trade places by regime — high-beta leads in risk-on expansions, low-vol leads under stress — and 1-year rolling dispersion between them has averaged ~19–22%, so being "generally right" on the regime is enough to harvest a large spread. Practitioner work explicitly frames low-vol as "not a buy-and-hold" but a regime allocation.
Universe
US low-vol vs high-beta factor ETFs — SPLV/USMV (defensive leg) and SPHB (offensive leg); RPV/RPG or SPY as optional confirmation.
How it works
Monthly, compute SPY 21-day realized volatility vs its own 1-year median plus SPY trend (price vs 200-day MA); hold SPHB when vol is below median and trend up, else rotate 100% to SPLV/USMV; hold 1 month.
Expected performance
Research-derived Sharpe estimate: 0.5–0.9.
Backtest this idea with SignalChain
This is a research lead — not a finished backtest. SignalChain takes an idea like this and runs the whole pipeline inside Claude Code: it researches the concept against academic and practitioner sources, sets benchmarks, writes and lints a VectorBT backtest, runs it, and grades the result PASS/FAIL. One command:
/signalchain Monthly rotate between SPHB high-beta and SPLV/USMV low-vol ETFs using SPY realized-vol regime plus 200-day trend filter
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Research & sources
- paceretfs.com — paceretfs.com
- alphaarchitect.com — alphaarchitect.com
- evidenceinvestor.com — evidenceinvestor.com
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Not financial advice. This page describes a research idea, not a recommendation. Any performance figures are hypothetical, research-derived estimates and are not indicative of future results. SignalChain is a research and educational tool; you are solely responsible for any decisions you make.