Why Is PepsiCo's Stock Down 10% While the S&P 500 Is Up 13% in 2026? Here's the Only Answer I Can Think of.

PEP stock has fallen 10% in 2026 while the S&P 500 climbed 13%, opening a 23-percentage-point performance gap. The beverage and snack giant is losing ground to KO, which reported 6% organic sales growth in Q2 2026 compared to PEP's 2.4%. That widening competitive gap is pressuring sentiment even as PEP maintains its Dividend King status with a 4.5% yield.

The company faces multiple headwinds: rising inflation, consumer belt-tightening, and shifting preferences away from packaged foods and snacks. KO's outperformance in organic sales growth—more than double PEP's rate—signals the Atlanta-based rival is winning the battle for consumer wallets in a tightening spending environment. Despite strong fundamentals, investors are rotating away from the consumer staples sector, leaving PEP's valuation compressed relative to the broader market.

The 4.5% dividend yield offers a cushion, but income alone hasn't been enough to offset the 10% decline. The Q2 organic sales gap versus KO remains the sharpest near-term risk.