Three of every four gross profit dollars in 2025 came from a single tax credit.

• The math. FY25 gross profit was $2.12B; $1.6B (76%) was the Section 45X production credit recognized as a reduction to cost of sales. Strip it and gross margin collapses from 41% to roughly 10% — back inside the pre-IRA cyclical range.
• The cash plumbing. $1.44B of FY25 operating cash flow was the proceeds from selling those credits to third-party taxpayers. Strip out 45X and OCF falls from $2.06B to $0.6B — below the $0.87B capex line. The 'first FCF year since 2014' headline is, mostly, subsidy plumbing.
• The unsettled rule. Final Treasury FEOC rules under the OBBBA — expected mid-to-late 2026 — decide whether FSLR's Series 6/7 fleet stays fully eligible. KeyBanc anchors a $150 floor if eligibility narrows; JP Morgan sees $303 if it widens.

Sell-side priced FEOC as a symmetric risk to FSLR. The mechanics make it asymmetric upside.

• The market read. 15+ price-target cuts since Feb 25, average from above $300 to roughly $240. Consensus treats FEOC final rules as a 50/50 binary on FSLR's $1.6B credit base. KeyBanc's $150 bear leans on '45X sunset / ASP −15%.'
• The mechanic. FSLR is the only large-scale US module maker with zero Chinese polysilicon, its own US glass and tellurium supply, and no Chinese cell or wafer suppliers. Every restrictive FEOC outcome that reduces FSLR's eligibility reduces every other US peer's eligibility by more, not less.
• The confirming tape. February 2026 — India solar exporters hit with a 126% US tariff. April 15, 2026 — reports China may curb solar-equipment exports to the US. Each move has narrowed the eligible competitor pool against a CdTe US-domestic operator. Nothing has gone the other way.

FY25 was the best year in company history — and the cleanest test of what's durable.

Margins, returns, and cash conversion all doubled versus FY2020 while leverage fell. The mechanism is policy — Section 45X plus tariffs that shut Chinese silicon out of the US — layered on a CdTe technology genuinely differentiated for domestic-content rules. Five of six listed solar peers (JKS, CSIQ, DQ, ENPH, SEDG) lost money in FY25; First Solar earned $1.5B.

Eleven officers sold together at $190 in March. No insider has bought in twelve months.

• The cluster. Two weeks after the Feb 24 guide-down, eleven named officers sold simultaneously — CEO Widmar, CFO Bradley, CCO, CTO, GC and others — followed by Bradley unloading another 32% of his stake at $200 on March 17. Aggregate 90-day insider sales: $15.0M. Open-market buys in the past twelve months: zero.
• The litigation tail. Pomerantz, Levi & Korsinsky, and Grabar Law have all opened investor investigations citing the cluster timing. The 2020 Smilovits securities class action settled for $350M on substantively similar themes. ISS Governance QualityScore stands at 8/10 (worst-quartile).
• The tape. A death cross printed on March 27 and remains active. Spot $191 is 14% below the 200-day; 6-month return −23% in a non-stressed market. Realized vol at 39% sits in the normal-regime band — investors are repricing fundamentals at orderly risk premia, not panicking.

Six months stacked with binary events — the one that resolves the debate sits at the back.

• Tonight. Q1 2026 prints after the close. Consensus EPS $2.83, revenue $1.05B; management's Q1 EBITDA floor is $400–500M. Zacks Rank #5 going in. A clean reaffirm of the FY26 EBITDA guide ($2.6–2.8B) plus first new bookings since the BP termination is the 'stop-the-cuts' moment Bulls need.
• Mid-to-late 2026. Treasury proposed FEOC regulations under the OBBBA. Comment period closed March 30. This single document decides whether 45X holds, narrows, or asymmetrically widens for FSLR's fleet. Every other catalyst calibrates around it.
• 2H 2026. The BP/Lightsource counterclaim alleging Series 7 'PV plant underperformance' moves through NY Supreme Court. One ruling touches the Series 7 warranty range, $384M of contractual termination receivables, and the door to the active class-action probes.