NEW YORK, June 21, 2026, 10:10 EDT
- Marvell finished the session at $310.58 on June 18, rising 7.27% ahead of the Juneteenth market break.
- The chipmaker is set to join the S&P 500 before the open Monday, taking Pool Corp.’s spot.
- Optical networking stocks are back in focus after KeyBanc raised its target and the group hit a new chip shipment milestone. This business, which uses light to move data in AI data centers, is drawing renewed investor attention.
Marvell Technology is set to start trading in the S&P 500 after a volatile push that saw shares gain about 11% in the holiday-shortened week. U.S. equity markets closed Friday for Juneteenth, so the last regular price was Thursday at $310.58. Markets stay closed through the weekend. The index change hits Monday.
Timing is key. Index funds and ETFs that follow the S&P 500 usually rebalance when a new stock joins. S&P Dow Jones Indices said Marvell will join the index before the open on June 22, replacing Pool Corp.
Marvell finished Thursday up 7.27% after bouncing around all week. The shares added 10.43% on Monday, dropped 9.78% Tuesday, then picked up 3.90% Wednesday, market data show. The stock hit $329.88 during Thursday’s session, signaling strong demand and some shaky positioning.
Wall Street attention turned back to Marvell’s optical-networking unit, pushing the shares. KeyBanc analyst John Vinh raised his price target on the stock to $385 from $260, writing that “Networking represents the most significant and durable growth opportunity,” according to a report on the note. Optical networking moves data with light-based links—helping AI data centers tackle bottlenecks as they connect more chips. Invezz
Tower Semiconductor had news moving the stock, not just index-related flows. The company said June 18 it shipped more than five million coherent photonic integrated circuits with Marvell to Marvell customers using them for AI data center interconnect networks. “This milestone illustrates the strength of our collaboration,” said Dr. Radha Nagarajan, Marvell’s SVP and CTO for optical engineering. GlobeNewswire
Marvell posted fiscal first-quarter revenue of $2.418 billion, rising 28% from a year earlier. The company set its second-quarter revenue outlook at $2.7 billion at the midpoint. CEO Matt Murphy said the quarter saw “exceptional AI-related bookings” and strong demand for optics, Ethernet switches and custom chips—these custom chips are built for specific customers’ workloads rather than as off-the-shelf parts. Marvell Technology, Inc.
Competition is tight for custom cloud chips. Marvell and Broadcom both build chips for cloud giants, but Nvidia still leads in AI computing and works with Marvell too. Back in March, Nvidia said it invested $2 billion in Marvell, expanding collaboration on NVLink Fusion and optical interconnects.
Marvell’s chief technology officer Noam Mizrahi said in an interview published Sunday that “the market has now reached the bottleneck that we’re solving.” That has become the new pitch for the stock. Investors are seeing Marvell less as a cyclical chip stock and more as an AI plumbing play, with bets that it gains whenever data centers upgrade links between processors. ynetglobal
The trade looks tight. Valuations leaning on AI demand, index flows and optical growth could turn if cloud clients pull back on spending, if custom-chip business relies on just a few customers, or if Broadcom and Nvidia grab a bigger share. Leadership moves remain on the radar: Marvell named Dan Durn chief financial officer, effective June 15, and kept its fiscal second-quarter outlook intact.
S&P 500 rebalance is done, so the week now tests what kind of buying comes in next. Passive inflows gave Marvell a push, but the next real move will probably need the company to show it can turn its optical and custom-silicon backlog into sales, and do it without hurting margins or talking up AI revenue too much.
