Key Highlights

● Tower Semiconductor shares climbed strongly after Mizuho initiated coverage at Outperform with a $300 price target, citing the company's position in silicon photonics.

● Tower is a specialty foundry that manufactures chips designed by other companies, focusing on analog processes for radio frequency, power management, image sensors and photonics.

● Silicon photonics uses light rather than electrical signals to move data, offering higher capacity and lower power use for the optical links that connect AI data centre processors.

● The move came amid a broader wave of optical and AI infrastructure interest, with Credo Technology, MaxLinear and Semtech also rallying the same session.

Tower Semiconductor got a big lift on Friday when Mizuho initiated coverage at Outperform with a $300 price target, pointing to the company's position in silicon photonics. Shares (NASDAQ:TSEM) climbed strongly on the Nasdaq Composite, one of the standout moves in a session where chip stocks led.

Mizuho Lights the Fuse

An Outperform rating means the analyst expects the stock to beat the broader market or its sector over time. A $300 target is the analyst's view of where the shares could trade over their chosen horizon. Initiations from major brokerages can draw attention from new investors, but they remain opinions, and the actual path of a stock can differ widely from any target.

What Tower Does

Tower Semiconductor, headquartered in Israel, is a specialty foundry. That means it manufactures chips designed by other companies, much like a contract manufacturer. Unlike the biggest foundries, which focus on cutting-edge processors, Tower concentrates on specialised analog processes used in areas such as radio frequency, power management, image sensors and, increasingly, silicon photonics.

Why Silicon Photonics Is Hot

Silicon photonics uses light, rather than electrical signals, to move data, with optical components built on silicon chips. In AI data centres, huge volumes of data must travel between thousands of processors. Optical links can carry more data over longer distances with less power than copper wires, which makes them increasingly important as AI clusters grow.

Friday's session showed how much interest there is in this theme. Credo Technology climbed after launching its 1.6T ZeroFlap optical transceiver, and MaxLinear rallied on AI and optical chip momentum without specific news. Semtech (NASDAQ:SMTC) rose after a new Buy initiation, and the broader semiconductor group was strong: ON Semiconductor topped the S&P 500 at $77.20 and Microchip Technology rose to $78.69.

AI deal-making added to the mood. Anthropic signed a seven-year, $11.6 billion cloud services commitment with Akamai that could expand to about $20 billion. Plans were outlined to more than double Nvidia chips at the Colossus 2 data centre by year-end. Both point to continued heavy spending on AI infrastructure, which ultimately needs faster data links.

The Market and the Macro

The Nasdaq Composite rose 129.34 points to 27,068.72 and posted a weekly gain larger than the S&P 500's. The S&P 500 closed at 7,743.41, up 39.28 points, and the Dow Jones Industrial Average jumped 478.64 points. The VIX eased to 14.87.

Rates remain the big cloud. The 10-year Treasury Yield touched its highest level since 2007 before settling near 19-year highs, and the 30-year yield sat at levels last seen in 2004. BlackRock's Rick Rieder called the bond sell-off "not a crisis but an eye-opener." Higher yields can weigh on Growth Stocks and raise the cost of building AI infrastructure. A Goldman Sachs note this week also questioned whether AI Capital spending will pay off.

Currency moves also mattered for the day: the dollar index slipped to about 100.76 on Friday, while the yen firmed against the dollar.

Testing Mizuho's Thesis

Micron's Earnings on September 30 will offer an important read on AI-related chip demand. For Tower, the next quarterly report, when scheduled, will show how quickly silicon photonics Revenue is growing relative to Mizuho's thesis. US-China meetings on AI and trade in Shenzhen in November could affect the chip Supply chain. Next week's PCE, ISM manufacturing, JOLTS and nonfarm payrolls data will shape the direction of yields.