Why is Broadcom (AVGO) stock up today?

Broadcom shares rose 1.32% to $389.11 on Tuesday, finishing inside a day range of $384.64 to $397.33. The dominant catalyst was news that Broadcom has secured a role as a key Apple supplier through a chip deal extending to 2031, with Evercore ISI calling the agreement a strategic positive for Apple — and, by extension, a durable revenue anchor for Broadcom.

The Apple deal matters to Broadcom's stock because long-term supply agreements reduce revenue uncertainty. Broadcom is a major designer of custom networking and wireless chips used in Apple devices, so a contract locked in through 2031 signals sustained, predictable demand well into the next product cycle. Evercore ISI's commentary reinforced that view among institutional investors.

The broader technology backdrop also helped. The QQQ (a large Nasdaq-100 ETF tracking big tech stocks) gained 1.12% on Tuesday, and the S&P 500 rose 0.38%, providing a tailwind for large-cap semiconductor names. Monday's cooler-than-expected CPI inflation data — headline CPI came in at a forecast of -0.1% month-over-month versus the prior 0.5% — had already improved sentiment around tech valuations heading into the session.

Broadcom's fundamentals remain robust: the company reported last-quarter revenue of $22.19 billion and earnings per share of $2.44, beating the $2.40 estimate. Revenue growth stands at 47.9% year-over-year and earnings growth at 85.4%. The market cap sits at approximately $1.85 trillion, with a trailing P/E (price-to-earnings ratio) of 64.1 and a forward P/E of 20.1 — a gap that reflects the market's expectation of sharply rising profits.

As of Tuesday's close, Broadcom's stock remains well above its 52-week lows but a Barron's piece noted that most individual S&P 500 stocks are actually trading lower — meaning gains have been concentrated in large-cap names like Broadcom. A 24/7 Wall St. piece also highlighted that Broadcom's volatility has been higher than benchmark ETFs in recent periods, underscoring that the stock's near-term moves can diverge significantly from the index.