AI Connectivity Stocks Outpace Chipmakers as Investors Target Infrastructure Bottlenecks

Wall Street showed signs of expanding its artificial intelligence investments beyond graphics processors on Sept. 4, as connectivity hardware providers outpaced market leader Nvidia. While Nvidia shares recorded a modest 0.8% gain, Astera Labs surged 9.8% and Marvell Technology rose 7.1%, according to trading data first reported by Yahoo Finance. The divergent movement highlights increasing focus on the networking silicon required to keep large computing clusters operating efficiently.

Modern artificial intelligence architectures depend on high-speed interconnects to prevent expensive processors from idling while waiting for data. Suppliers of switches, retimers, optical components, and custom logic address this throughput bottleneck across multi-node server racks. Astera Labs has positioned itself as a focused provider of rack-scale connectivity infrastructure. In its second-quarter business update, the company highlighted an upcoming third-quarter production ramp for its Scorpio X-Series 320-lane fabric switch as a key revenue driver, alongside continued growth across its Aries, Taurus, and Leo product lines.

Astera's growth thesis centers on expanding silicon content per server rack, though the company remains vulnerable to customer concentration among major hyperscale cloud operators and execution risks during product transitions. Astera's September stock movement also followed market speculation that the company might join the S&P 500, though it was ultimately excluded from the index's September rebalance. Exchange data from mid-August showed short interest standing at 8,753,228 shares with 1.85 days to cover—a 3.9% drop from the previous period—indicating that short covering was unlikely to be the primary cause of the share price increase. Institutional sentiment had already built ahead of the rally, with 73 hedge funds holding positions as of June 30 compared to 53 on March 31, including Lee Ainslie's Maverick Capital, which boosted its stake by 12% to 1,067,215 shares.

Marvell Technology offers a broader portfolio spanning custom compute accelerators, electro-optics, switching gear, and interconnect silicon. This broad product scope allows Marvell to secure multiple design placements within a single cloud provider's system layout. However, custom chip programs carry risk due to long lead times, substantial development costs incurred before initial revenue, and potential delays in customer deployments.

Hedge fund accumulation in Marvell also picked up during the second quarter. The number of funds holding shares of Marvell increased to 96 by the end of June, up from 79 at the end of March. D. E. Shaw recorded a notable increase in exposure, expanding its position by 658% quarter-over-quarter to reach 2,504,623 shares.

For both connectivity vendors, sustained stock performance will depend on converting preliminary design wins into recurring production revenue, preserving gross margins, and expanding their customer bases. As networking standards and optical architecture requirements evolve, tracking inventory levels, component adoption schedules, and overall revenue concentration will remain crucial for evaluating the segment's trajectory.