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Free to readRegime Alerts: When Size Should Change
You don't watch the regime panel all day. You get told when the realized-vol percentile or the Nations indexes cross a threshold that changes your size multiplier — and by how much.
The regime classification is not a static label. It shifts as realized vol moves through its trailing-year distribution and as the live Nations indexes react to market conditions. The alert engine watches the exact thresholds that drive the size multiplier, so that a regime shift — which changes the correct position size for every live position — reaches you before the market does the resizing for you.
What fires a regime alert
Three conditions trigger a regime-level alert. First, the realized-vol percentile crosses 40 — the Calm-to-Elevated boundary. Every position in the book is now correctly sized at ×0.70 rather than ×1.0; the alert quantifies the trim needed on each name. Second, the realized-vol percentile crosses 75 — the Elevated-to-Stressed boundary. The multiplier drops to ×0.45; the alert lists the positions that need the largest reduction. Third, a RiskDex® spike above 3.0 — even if the realized-vol percentile hasn't yet crossed 75, an elevated RiskDex® combined with a moderately high percentile forces a Stressed classification; the alert fires on the combination, not on either input alone.
30-day realized vol on SPY has moved into the 76th percentile of its trailing year. RiskDex® confirms at 3.41. Size multiplier changes from ×0.70 → ×0.45. Action: trim all active SPY-based positions to the new regime-adjusted size.
30-day realized vol on QQQ moved from the 34th to the 42nd percentile. Multiplier changes from ×1.0 → ×0.70. Action: reduce QQQ-based positions to 70% of full inverse-vol size.
Realized vol on IWM has declined back to the 36th percentile from a prior Elevated classification. RiskDex® has normalized. Multiplier restores to ×1.0. Action: review active positions; you may size back toward full inverse-vol target if the thesis still holds.
As the realized-vol percentile (blue line) crosses the 40th threshold (amber dashed), an Elevated alert fires — the multiplier drops to ×0.70. Crossing the 75th (red dashed) triggers a Stressed alert and a ×0.45 multiplier. Falling back below 40 restores Calm and the ×1.0 multiplier.
Position-level alerts
Beyond regime-level alerts, the system supports position-level alerts for names you are actively trading. Set a watch on a specific underlying: when that name's realized-vol percentile crosses a threshold, the alert fires with the old size, the new size, and the arithmetic of the trim — so you can execute the rebalance from the notification without opening the tool to recalculate.
A regime alert is a recalculation prompt, not a forced exit. The correct response is to pull up the Position Sizer, re-run the formula with the current vol and multiplier, and adjust positions to the new output. If the regime shifts to Stressed while you are asleep and you see the alert at open, the first task of the day is the rebalance — not a directional opinion on where the market goes next.
How it's delivered
Regime alerts run on the Nations alert engine — the same system that powers the VolDex® and index-level alerts. They poll the realized-vol percentile and the Nations index readings on a regular schedule during market hours and dispatch by email or SMS when a regime threshold is crossed. The alert includes: the name, the old and new regime classification, the old and new multiplier, and the recommended sizing adjustment as a percentage of the current position.
Understanding regime alerts is free. Setting them on your names: ETFs via ETF Analytics, single stocks via ETF + Equities. Position-level rebalancing alerts with the full Nations-index feed are part of Everything.
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Open the Position Sizer tool → Read: trading with vol-targeted sizing → Read: this week's sizing read →Educational content from Nations Indexes. VolDex® and RiskDex® are registered marks of Nations Indexes. Alert availability and delivery depend on plan and configuration. Nothing here is investment advice.