Before the market crash, key indicators showed hedge funds' gross exposure (the total value of long and short positions) was at historic highs. This extreme leverage meant that any catalyst forcing de-risking would inevitably trigger a large, cascading deleveraging event, regardless of the initial narrative.

Increased market volatility raises the Value at Risk (VAR) for trading positions. For systematic funds like CTAs that use VAR-based position sizing, this can automatically force them to reduce holdings to maintain risk targets, adding selling pressure that is independent of fundamental views.

The boom in leveraged ETFs, heavily concentrated in tech and crypto, forces systematic buying on up days and selling on down days to maintain leverage targets. This creates a "negative gamma" effect that structurally amplifies momentum in both directions and contributes to market fragility.

Recent steepening in the U.S. yield curve is not just due to domestic factors. Fiscal uncertainty in Japan is pushing Japanese Government Bond (JGB) yields higher, making U.S. Treasuries less attractive on a currency-hedged basis for global investors, thus pushing long-term U.S. yields up.

Programmed strategies from systematic funds, which delever when volatility (VIX) rises and relever when it falls, are the primary drivers of short-term market action. These automated flows, along with pension rebalancing, have more impact than traditional earnings or economic data, especially in low-liquidity holiday periods.

While the macro environment appears supportive of pro-cyclical currencies, several warning signs could trigger a correction. Notably, the aggressive flattening of the US yield curve (e.g., 5s30s spread breaking below 100bps), even if driven by stronger growth, historically signals caution for high-beta assets and could challenge the current consensus view.

During the recent broad bond sell-off, the 5-year Treasury sector counter-intuitively outperformed, making it appear historically expensive ('two standard deviations too rich') relative to the rest of the curve. This anomaly suggests it is vulnerable to a correction and could underperform going forward.

Since 2022, highly leveraged hedge funds have bought 37% of net long-term Treasury issuance. This concentration makes the world’s most important market exceptionally vulnerable, as any volatility spike could trigger forced mass selling (degrossing) from these funds.

The dominance of leveraged hedge funds as the marginal buyers of long-term bonds means that during a crisis, bonds are sold off alongside equities. This forced de-leveraging negates their traditional safe-haven role, transforming them into a risk asset that falls during market stress.