The simplest strategy in investing, buying things that are already going up, is currently printing money at a rate not seen in more than three decades. MSCI’s global momentum gauge has outperformed the MSCI All Country World Index by 17 percentage points since the end of March 2026.
That gap represents the strongest two-month outperformance streak on record since Bloomberg started tracking this data in 1991. The engine behind it is exactly what you’d expect: AI stocks, and the herd of investors stampeding toward them.
Momentum investing is having its moment
Here’s how momentum investing works. The MSCI ACWI Momentum Index uses a rules-based approach that selects and weights stocks based on their recent price performance while ensuring adequate liquidity. In English: it buys the winners and rides them higher.
The bubble question nobody wants to answer
