📂 $XLE

Today's S&P 500 dropped less than half a percent — but three in four stocks fell. When cap-weighting hides a rout, breadth is the instrument that tells the real story.

Only 25.5% of the QuantLogix universe advanced today, even though the S&P 500 fell a contained 0.48%. That gap between index damage and stock-level damage is why breadth matters before traders call a dip buyable.

Tuesday’s tape looked modest at the index level, with the S&P 500 down 0.58%. Under the hood, only 34% of QuantLogix-covered stocks advanced while the VIX jumped 8.19%, making breadth the day’s real signal.

Five9 fell 5.77% to $31.38 today as QuantLogix flipped the stock from Buy to Strong Sell with a 1/100 composite. The useful lesson is how to treat an extreme multi-factor signal as a risk-control alert, not a standalone trade command.