Stocks making the biggest moves midday: Sandisk, Tesla, Lululemon, Quanex, AMC & more

Stock moves were mixed midday: Guidewire plunged 21% as current-quarter revenue guidance of $372M–$378M missed the $387M consensus, while Lululemon fell 17% on a weak forecast (E7–98 cents EPS; $2.29B–$2.32B revenue vs $2.40 and $2.53B expected) and Equifax/TransUnion slid 6.8%/+7% after claims of overcharging. Offsetting gains included Quanex up 19% on a Q3 beat (79c vs 66c; $501.8M vs $497.5M) and Smith & Wesson up 6% with EPS of 6c vs an expected loss and revenue of $112.6M vs $98.7M. Tesla dropped 6% amid an NHTSA investigation into Cybercab safety compliance following its Austin launch.

Analysis

The biggest market signal is a renewed penalty on deferred-revenue and subscription models with even modest execution noise. GWRE/ASAN/PATH-like names are being marked down not for one quarter of missed revenue, but because investors are implicitly assuming slower implementation conversions and longer sales cycles, which pressures next 2-3 quarters of bookings-to-revenue conversion and compresses EV/Sales multiples. That same “prove it” regime can spill into higher-quality software such as ZS and ADBE if enterprise CIO budgets stay cautious into budget season.

The credit-data group is facing a different regime shift: this is less about near-term earnings and more about regulatory option value being repriced out of the stocks. If FHFA rhetoric turns into actual fee pressure, the immediate P&L hit is manageable, but the multiple damage can be larger because these businesses rely on perceived pricing durability; the second-order winner is any alternative scoring/vendor stack that can negotiate down bureau economics over 6-18 months. This is a headline-driven tape, but the risk is that the headlines become a structural overhang before any formal rulemaking.

On the consumer side, LULU and OXM suggest premium discretionary demand is normalizing faster than consensus modeled, which usually shows up first as promo intensity and then as downward estimate revisions across peers with similar inventory turns. TSLA’s regulatory probe is not a cash-flow event today, but it directly attacks the autonomy premium embedded in the stock and could slow the timeline for a software-like valuation case if launch/approval friction persists. The semis bid looks more like position squaring into a holiday than a new fundamental leg, though memory is the cleaner relative beneficiary if data-center and AI capex stay firm.

Key Decisions for Investors

• Favor a 1-3 month relative-value long SNDK / short a software basket (GWRE, ASAN, PATH) into any post-long-weekend strength; thesis is earnings-revision dispersion, not beta. Falsify if enterprise software bookings stabilize and memory prices roll over.
• Stay short or underweight FICO on rallies; the name has the highest multiple sensitivity to even soft regulatory action, while the downside is more about re-rating than immediate earnings damage. Cover if FHFA messaging fades without follow-through in 2-4 weeks.
• Use LULU weakness as a tactical short only on failed bounces, not here-and-now panic selling; the trade works if gross-margin guidance keeps drifting lower over the next quarter. Stop if management regains pricing confidence or comparable sales inflect.
• Treat TSLA as a catalyst-driven short-dated hedge rather than a structural short: buy put spreads or reduce exposure if regulatory headlines compound over the next 1-4 weeks. The thesis breaks if the investigation is narrowed quickly and autonomy rollout proceeds without delay.
• Avoid bottom-fishing GWRE until there is evidence the miss was timing, not demand; a reclaim of the post-gap level on improving bookings would be the cleaner entry. Otherwise, let the de-rating play out.