Short Interest Meets Unexplained Buying in AXT's Rebound

The setup — Technology equities regained ground in Monday's session as benchmark semiconductor and software funds bounced, even while long-term Treasury yields edged higher. Hyperscalers continued securing dedicated power generation and funding rival silicon architectures to alleviate hardware bottlenecks. Against this broader rebound, optical substrate supplier AXT Inc led liquid technology gainers ahead of quarterly results. Optical networking took center stage.

What's moving

Alternative chip architectures attracted fresh capital during Monday's trading. Privately held Tenstorrent secured $1.5 billion at a $6.2 billion valuation to scale its open-weight processors (per TechCrunch). The funding allows the firm to remain independent after drawing acquisition interest earlier this year. Cloud customers are actively looking for alternatives to proprietary compute stacks. Hardware diversity is gaining urgency.

Power procurement also advanced during market hours. Amazon signed an agreement with X-energy and American Electric Power to build 12 small modular reactors at a retired coal facility in Indiana (per TechCrunch). The project aims to provide nearly one gigawatt of baseload power for regional data centers under a long-term contract. Compute operators cannot expand clusters without dedicated generation. Grid constraints dictate physical buildouts.

Scrutiny of data center returns intensified after the closing bell. Several flotations for data-center providers have been shelved this month as investors questioned the sustainability of heavy capital expenditure (per MarketWatch). The pushback leaves Anthropic as the primary private firm on tap for a potential public market debut this year (per CNBC). Capital is becoming more selective.

Featured: AXT Inc ($AXTI)

The move

Shares of AXT Inc ($AXTI) rose 10.3% in Monday's session to close at $56.79, up from the prior close of $51.47. Trading volume reached 13,551,648 shares, running roughly 1.5 times the 30-day average of 9,112,257. Despite the single-session gain, the stock sits 59.7% below its 52-week high of $140.83, while remaining 1056.6% above its 52-week low of $4.91. The equity trades 19.1% beneath its 50-day moving average of $70.16 and 10.2% below its 200-day moving average of $63.25. Over the trailing month, the stock has fallen 18.9%, even after a 238.8% gain year to date. Momentum remains deeply broken.

What drove it

Nothing in Monday's regulatory filings or news coverage explains the sudden jump. The company posted no disclosures, and no analysts issued revised targets or ratings during the session. With fundamental news absent, positioning offers the only measurable backdrop for the move. Short sellers held 17.2% of the float, representing 1.2 days to cover across 61.6 million shares. In addition, the company is scheduled to report quarterly earnings on October 29, just nine days away. When a heavily shorted stock nears an earnings date, a sudden wave of buy orders can trigger covering and magnify price swings. Only subsequent filings or earnings results will confirm whether real demand drove the move. Next week will provide the answer.

The bigger picture

AXT operates in compound semiconductors, manufacturing substrates from indium phosphide, gallium arsenide, and germanium. Indium phosphide serves as the baseline material for laser diodes and photodetectors used in high-speed optical transceivers. As artificial intelligence models scale across massive compute clusters, copper wiring struggles with signal loss, heat, and latency over longer distances. Optical interconnects replace copper with light, carrying data between server racks at higher bandwidth and lower power. That architectural transition drove AXT's latest quarterly revenue up 164.8% year over year.

Yet profitability remains thin. The company generated a trailing twelve-month net profit margin of 3.2%, leaving the business valued at an enterprise value to sales ratio of 27.1 and a trailing price-to-earnings multiple of 1419.8. Wall Street consensus projects a forward price-to-earnings ratio of 25.2, with a mean price target of $91.60 across five analysts. In our dashboard, hyperscaler capital expenditure is running 97.7% above last year, which our cycle monitors classify as saturation. When spending hits elevated levels, chip customers routinely scrutinize order sizes and delay component purchases. The coming print must justify the multiple.

Across the tape

Technology peers showed broad strength across Monday's session. MaxLinear ($MXL) rose 8.1% to $77.11, while JFrog ($FROG) gained 7.9% to $91.00. High-performance data center play Applied Digital ($APLD) climbed 6.7% to $19.25, and memory interface specialist Rambus ($RMBS) added 6.2% to $92.66. Storage provider Western Digital ($WDC) rose 6.1% to $352.21. Selling clustered in selected speculative issues. Cerebras Systems ($CBRS) dropped 5.2% to $120.66, extending a slide after hitting annual lows earlier this month. Quantinuum ($QNT) fell 4.4% to $34.93, and Trump Media & Technology Group ($DJT) declined 8.0% to $6.43.

Index funds reflected an appetite for risk assets. The Semiconductor ETF ($SMH) gained 1.6%, matching the 1.6% rise in the Software ETF ($IGV). The Nasdaq 100 ETF ($QQQ) climbed 1.2%, while the S&P 500 ETF ($SPY) advanced 0.4%. Fixed income provided an offset to equity strength. The 10-year Treasury yield rose four basis points to 5.14%. WTI crude oil fell 2.4% to $101.14 per barrel, and gold slid 0.4% to $4,143.20. Treasuries took the lead.

What to watch

• AXT third-quarter earnings on October 29: Look closely at gross margins in the indium phosphide product line and management commentary on data center transceiver demand.
• Optical transceiver orders: Track upcoming earnings reports from optical module makers to determine whether data center switch interconnect ramps are accelerating or pausing.
• Alternative silicon adoption: Monitor developer usage of open-weight toolkits following Tenstorrent's $1.5 billion funding round.
• Small modular reactor licensing: Watch regulatory milestones for the proposed Indiana nuclear installation backed by Amazon.

Execution will decide the trade.