QuantumStreet AI just dropped a pretty impressive stat: 98% of its index strategy assets outperformed their benchmarks in the first half of 2026. The other 2% matched their benchmarks. None of them underperformed. That's a clean sweep, especially in a six-month stretch that threw macro uncertainty, geopolitical tensions, and sharp sector rotation at everyone.
The firm's Foresight Multi-Asset Index led the pack with a 12.64% return, beating its benchmark by 2.97 percentage points. Its AIPEX TE250 Index gained 11.50%, which was 1.99 percentage points better than SPY. Not bad for a period when the S&P 500 was doing its usual seesaw.
How'd they do it? QuantumStreet says it was all about stock selection—specifically in semiconductor and AI infrastructure names. Think Micron Technology (MU), Lam Research (LRCX), Qualcomm (QCOM), and Twilio (TWLO). The firm didn't try to outsmart the market with sector rotation; it just picked the right stocks within the sectors it already liked.
Explainable AI: Not Just a Black Box
Portfolio managers are increasingly leaning on AI, but many institutional investors are still wary of "black-box" models that don't explain their decisions. QuantumStreet is trying to stand out by using explainable AI. Specifically, it uses the SHAP (Shapley Additive Explanations) framework to show how each individual signal contributes to every portfolio position. So if you're a risk manager or on an investment committee, you can actually see why the model is buying or selling something.
The firm's flagship AIPEX strategy returned 10.85% in the first half of 2026, versus 9.66% for the Russell 1000 Index, all while keeping its technology allocation broadly stable. Its AIPEX TE250 strategy applied the same stock-picking process but within a 2.5% tracking-error budget, and it still managed to squeeze out nearly 2 percentage points of excess return over SPY.
According to QuantumStreet, being able to explain every allocation decision helps risk teams and investment committees evaluate AI-driven strategies more confidently—especially when markets get choppy. And given the first half of 2026 was anything but calm, that transparency seems to be paying off.
