Goldman Sachs’ High-Beta Momentum Basket (GSPRHIMO) has plunged 18% over the past two trading days, marking the largest two-day decline since 2020. This sharp selloff is concentratedly reflecting the simultaneous impact of three pressures: liquidity contraction, excessive positioning concentration, and seasonal weakness.
Hours before the crash, Goldman issued a warning about “summer doldrums,” explicitly flagging the risk of a pullback in the July momentum factor. Although the current drawdown has already created room for a short-term tactical rebound—historically, momentum factors often record positive performance when investors step in at lower prices during pullback phases.
Goldman’s trading desk also emphasized that positions in the momentum factor remain highly crowded. If the de-leveraging trend continues, the maximum potential drawdown could still be as large as twice the current decline. Overall, the market appears to be in the early stage of position unwinding for momentum strategies; the key in the next phase will hinge on the interplay between the liquidity environment and the pace of sentiment repair.
The decline hits a multi-year high, as multiple factors compound to amplify volatility
In its latest report, Goldman strategist Guillaume Soria said the severe pullback in the momentum factor was not triggered by a single catalyst, but rather the result of multiple unfavorable conditions converging.
The strong unrealized gains built up from the first half of the year, liquidity in markets contracting noticeably ahead of the holiday weekends, factor volatility rising to a five-year high, and the usual end-of-quarter pressure for position rebalancing together pushed the adjustment magnitude of the high-beta momentum strategy to extreme levels.
Data show that since its peak, the momentum factor has fallen 24% in total, the largest drawdown since the first quarter of 2023 and significantly above the historical average drawdown of roughly 12%. Looking at the adjustment period, the historical mean takes about 24 days, whereas the current decline has unfolded in just 10 days.
Notably, during this period the South Korean market recorded a record net selling by foreign investors, while local institutions actively entered to buy and hedge against external selling pressure—suggesting that this momentum liquidation has taken on a clear global synchronization effect.
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