Breadth Momentum: Graduated Protection Based on How Many Assets Are Trending

Breadth momentum is a protection mechanism that measures the overall health of a multi-asset universe by counting how many assets are in positive momentum territory. Rather than making a binary decision — fully invested or fully defensive — breadth momentum scales the defensive allocation continuously based on the proportion of assets showing weakness. When most assets are trending positively, the portfolio is fully invested. As breadth deteriorates — as more assets fall below their moving averages or show negative momentum scores — the portfolio progressively increases its bond allocation.

How It Works

Each month, all assets in the strategy's universe are evaluated against a momentum criterion — typically whether their price is above their moving average or whether their multi-period momentum composite is positive. The count of assets meeting the criterion produces a breadth score. This score is converted into a crash protection fraction that determines what percentage of the portfolio shifts to bonds.

The conversion can be linear (each additional negative asset adds a fixed increment to the bond allocation) or sensitivity-adjusted (a configurable parameter controls how aggressively the bond fraction scales with deteriorating breadth). The key property is continuity — the defense scales smoothly rather than jumping discretely between states.

Why Graduated Protection

Binary protection mechanisms — fully invested when the signal is positive, fully in cash when negative — create a fundamental dilemma. Set the trigger too sensitive and the strategy whipsaws in and out during minor corrections. Set it too loose and the strategy fails to protect during genuine bear markets. Breadth momentum resolves this by eliminating the binary switch entirely.

The graduated approach means the strategy is never fully right or fully wrong. During a minor correction affecting three of twelve assets, perhaps 25% of the portfolio shifts to bonds — enough to reduce impact without forfeiting the majority of equity participation. During a severe crisis affecting ten of twelve assets, 80% or more shifts to bonds — providing substantial protection. The severity of the response automatically matches the severity of the market stress, without requiring any threshold calibration or binary decision.

Strategies That Use Breadth Momentum

• PAA — the original graduated breadth strategy, monitoring 12 assets against their 12-month SMAs
• PAA-CPR — same framework with higher sensitivity (earlier, larger defensive shifts)
• VAA-G12 — applies 13612W breadth across 12 assets with graduated defense
• EAA-OFF and EAA-DEF — breadth-based bond fraction with elasticity scoring
• EAA-LEG-OFF and EAA-LEG-DEF — merged PAA breadth with EAA scoring

Breadth vs Binary Protection

Breadth momentum produces smoother transitions and fewer whipsaw events than binary protection. The trade-off is slower response during sudden, sharp crashes — the protection fraction increases gradually rather than immediately. A binary strategy like VAA-G4 exits completely on the first negative signal, potentially avoiding more of a sudden crash. A breadth strategy like PAA builds its defense progressively, potentially absorbing more of the initial decline but avoiding the false-alarm costs that plague binary approaches during choppy markets. The choice between the two reflects a fundamental trade-off between responsiveness and smoothness.