Can Coca-Cola Sustain Growth in Its Sparkling Soft Drink Business?

Coca-Cola's Trademark Coca-Cola volume rose 5% year over year in Q2 2026, its strongest quarterly growth in 17 years excluding the COVID recovery period, aided by FIFA World Cup marketing, innovation and packaging/pricing initiatives. Mr. Pibb volume grew more than 20%, while Coca-Cola Zero Zero expanded into additional markets; however, management cautioned that tougher second-half comparisons and roughly 2% two-year volume growth limit extrapolation. KO shares are up 26% year to date versus 14% for the industry, trade at 25.44x forward earnings versus 19.2x for peers, and consensus projects EPS growth of 9.7% in 2026 and 7.1% in 2027.

Analysis

KO's premium valuation leaves little room for a normalization in unit demand: with consensus already underwriting high-single-digit EPS growth, the next 1-3 months hinge less on brand momentum than on whether price/mix can remain positive without sacrificing household penetration. Smaller packs protect nominal affordability but can raise packaging and distribution cost per ounce; this is margin-accretive only if realization exceeds those costs and promotional intensity stays contained. A deceleration in North American scanner volumes would therefore matter more than another quarter of reported revenue growth.

KDP has the cleaner relative setup. Its newer zero-sugar and functional-CSD formats offer a mix-upgrade pathway while its valuation has historically carried less defensive-premium risk than KO; sustained velocity could support estimate revisions over the next two earnings cycles. PEP is the weak link in a beverage pair because beverage execution must offset a broader snack-led consumer and input-cost exposure, making its consolidated organic-growth profile more vulnerable if value-seeking consumers trade down.

The contrarian read is that the category's apparent resilience may be partly event-driven and promotion-supported rather than evidence of a renewed secular volume cycle. If two-year unit growth remains muted, KO's multiple can compress even with EPS delivery as investors re-rate it from a growth-defensive to a bond proxy. Falsify the cautious KO view with sequential acceleration in tracked U.S. unit velocity, stable gross margin despite package mix, and an upward revision to FY27 organic-sales guidance; falsify the KDP preference if zero-sugar retail-sales growth falls below low-double-digits or trade spending materially rises.

Key Decisions for Investors

• Initiate a 3-6 month long KDP / short KO pair, sized beta-neutral: seek relative upside from KDP estimate revisions and protect against broad staples de-rating. Reassess if KDP's next reported U.S. CSD growth decelerates below 10% or KO raises medium-term organic-growth guidance.
• Do not add outright KO after its rerating; wait for a 5-8% pullback or evidence of sustained unit acceleration in syndicated scanner data. At the current premium, downside from a modest multiple reset likely exceeds upside from unchanged consensus estimates over the next quarter.
• Maintain an underweight PEP versus KDP through the next earnings print. Use a close above post-earnings relative-highs in PEP/KDP, coupled with improving North American beverage volumes, as a stop signal; the key risk is an aggressive promotional response that restores Pepsi volume share faster than expected.
• Monitor aluminum, PET resin, and sweetener costs alongside mini-pack mix over the next 1-3 months. Rising packaging inputs without corresponding net-price realization would be an early margin-warning signal for KO and KDP rather than a reason to chase reported top-line growth.