Stocks making the biggest moves after hours: DoorDash, Zillow Group, ARM Holdings, Fortinet and more

After-hours trading was driven by a wave of earnings and guidance updates, led by strong moves in ARM (+6%), DoorDash (+14%), Fortinet (+16%), and Albemarle (+3%) on beats or raised outlooks. Offsetting that strength were sharp declines in Whirlpool (-16%), Fastly (-30%), and Snap (-6%) after weaker guidance, while Zillow (-7%) and IonQ (-4%) also disappointed relative to expectations. Overall, the article reflects a mixed but earnings-heavy session with company-specific stock impacts rather than a market-wide macro catalyst.

Analysis

The tape is rewarding companies that can prove near-term monetization durability, while punishing anyone whose guidance implies slower conversion of demand into cash flow. The strongest second-order read is that ad-tech and consumer internet names with visible forward demand signals are being treated as higher-quality duration assets, while hardware and cloud platforms without clear acceleration are being de-rated despite headline beats. That dispersion should persist until the market gets a better read on whether this is a one-quarter guide-up cycle or a broader inflection in spend.

The clearest competitive winner is the payments/take-rate ecosystem around on-demand commerce: a stronger order outlook from delivery benefits merchant acquisition, local advertising, and logistics enablers more than the headline company alone. In cyber, the better billings signal should support the group, but the bar has now moved up for names that cannot translate pipeline into durable renewal strength. The weaker prints in housing, appliances, and cloud edge infrastructure suggest end-demand is still soft enough that any mix miss or guidance reset gets punished immediately.

The most interesting contrarian setup is that some of the biggest post-earnings losers may be closer to peak negativity than the market implies. When a stock gaps down 15-30% on guidance, the next move is often less about fundamentals and more about positioning cleanup over the next 2-6 weeks; that argues for selective mean reversion only where the balance sheet is intact and the miss is timing-related rather than structural. By contrast, the winners with large guide-ups may see follow-through only if the next data point confirms acceleration; otherwise the moves can fade as valuation expands faster than estimates.

For the AI/innovation cohort, the message is more mixed: investors still want proof that compute-adjacent and frontier-tech stories are converting into better EBITDA, not just bigger losses. That keeps pressure on speculative growth and favors companies with recurring revenue, enterprise budgets, and visible billings expansion over concept names. In the near term, the market is effectively charging a premium for predictability and discounting optionality unless the latter comes with a credible path to cash generation.

Key Decisions for Investors

• Go long DASH vs. short SNAP for the next 1-2 weeks: both are consumer-internet sentiment trades, but DASH has a clearer demand/revenue conversion path; use a 1.5:1 upside/downside target with stop-loss on a reversal in order-growth commentary.
• Initiate a tactical long FTNT with a 1-3 month horizon; buy on any post-gap consolidation rather than chasing the open. Risk/reward remains favorable if billings revisions hold, but trim if the next channel check suggests the guide-up was pull-forward.
• Fade WHR on rallies over the next 2-4 weeks or use bearish calls spreads: the magnitude of the reset implies de-rating can continue if housing replacement demand stays weak. Best risk/reward is into any failed bounce, not into immediate weakness.
• Consider a pair trade long ALB / short IONQ for 1-2 months: ALB has a real fundamental inflection and operating leverage, while IONQ remains exposed to widening loss skepticism and sentiment compression in unproven frontier tech.
• Avoid adding to FSLY and COHR until there is confirmation of sustained guide-through; both can bounce mechanically after large drawdowns, but the better trade is to wait for stabilization rather than catching the knife.