Bloomberg Stock Movers
2026-09-17 · Hosted by — · Bloomberg / iHeartMedia
Executive Summary
Generac shares jumped nearly 35% in pre-market trading after signing a deal to supply Amazon with backup generators for its data centers, an initial two-year agreement worth around $2.4 billion that could ultimately total $8 billion in sales. Amazon also received a warrant to buy up to 2.6% of Generac's common stock at around $200 a share. NeoCloud provider Nebius rose another 10% in pre-market trading after reports it is raising on-demand compute pricing for Nvidia chips by 17-21% starting October 1, a signal of strong AI compute demand.
Key Stories & Changes
1. Generac Surges on Amazon Data Center Generator Deal
GNRC: Generac — +~35% pre-market — Signs deal to supply Amazon data centers with backup generators
Initial two-year deal deliveries valued at around $2.4 billion; total deal could reach $8 billion in sales
Represents roughly a 25% increase relative to Generac's $4.2 billion in prior-year revenue
Amazon received a warrant to purchase up to 2.6% of Generac's common stock at around $200/share
Stock closed up 28% on the year even before this move; traded as high as $290 in June, was near $235, and the pre-market pop pushes it back toward peak levels
2. Nebius Rises on Higher Compute Pricing
NBIS: Nebius — +10% pre-market — Reportedly hiking on-demand GPU compute rates 17-21% starting October 1
Nebius is a "NeoCloud" company renting out Nvidia GPU compute capacity to AI users
Price increases (17-21% depending on chip type) signal continued strong demand and increased monetization of prior chip investments
Company has a strategic partnership with Nvidia, which invested $2 billion earlier this year
Shares up more than 150% year-to-date prior to this move
3. Fluence Energy Plunges on Revenue Cut
FLNC: Fluence Energy — -22% pre-market — Cuts full-year revenue forecast on manufacturing delays and supply chain issues
New full-year revenue guidance of about $2.4 billion, down from prior outlook and roughly 20% below Wall Street estimates
Delays stem from switching from automated to hand-welding at its Houston manufacturing facility, plus ongoing supply chain bottlenecks
Baird cut the stock to underperform; Truist and Piper Sandler cut price targets
4. Lennar Misses for a Third Straight Quarter
LEN: Lennar — -~2.5% pre-market — Third-quarter EPS and revenue both miss estimates
EPS of $1.23, six cents below estimates
Company cut guidance on closings for the second time this year
Bloomberg Intelligence expects continued pressure into next year as mortgage rates rebound above 7%, weighing on demand and margins
Stock already down 24% on the year following two prior years of declines
Trends Identified
1. AI Data Center Buildout Continuing to Drive Winners Across Adjacent Sectors
Generac's generator deal and Nebius's ability to raise compute prices both point to persistently strong demand tied to AI infrastructure buildout — power backup and GPU compute capacity are both being monetized at premium rates, suggesting no near-term slowdown in AI-related capital deployment.
2. Housing and Energy-Storage Names Facing Company-Specific and Macro Headwinds
Lennar's third straight miss and Fluence Energy's guidance cut both stem from a mix of company-specific execution issues (manufacturing delays, weak orders) and macro pressure (mortgage rates rebounding above 7%), showing that not all rate-sensitive or infrastructure-adjacent sectors are benefiting equally from the broader AI investment cycle. ---
Sentiment Analysis
Overall Market Sentiment: Bifurcated — AI Infrastructure Bullish, Housing/Energy Storage Bearish
Stocks tied directly to AI data center demand (Generac, Nebius) rallied sharply, while housing and clean-energy-storage names (Lennar, Fluence) fell on execution and demand concerns.
Risk Factors Highlighted
Manufacturing execution risk: Fluence Energy's shift to hand-welding and ongoing supply chain bottlenecks highlight operational fragility in energy storage manufacturing.
Mortgage rate pressure on housing: Rates rebounding above 7% are compounding Lennar's demand and margin challenges, with Bloomberg Intelligence expecting continued pressure into next year.
Concentration risk in AI-linked infrastructure gains: Generac and Nebius's rallies are highly dependent on continued AI data center capital expenditure; any slowdown in that spending could reverse recent gains.
This episode was covered in today's [The Market Signal — 2026-09-17](https://marketsignal.beehiiv.com/p/the-market-signal-2026-09-17), a cross-source synthesis of multiple podcast reports.