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NewsEarnings

Lam Research surges 17%, AMD and Micron follow as chip earnings reset the tape

Strong earnings from Lam Research, Microsoft, and Arm reversed a run of selling pressure across semiconductor stocks, with Lam Research (LRCX) advancing 17% in the session. AMD (AMD) and Micron (MU) surged alongside it. The three results together reset the tape for a group that had been hard-hit heading into the day.

By Amara DialloNewsroomJuly 31, 20262 min read
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Key takeaways

  • Lam Research (LRCX) surged 17% in a single session after posting strong earnings, anchoring a broad semiconductor rally.
  • Strong prints from Lam Research, Microsoft (MSFT), and Arm (ARM) together reversed recent selling pressure across chip stocks.
  • AMD and Micron (MU) rose sharply on the strength of the three companies' results rather than their own earnings.
  • The semiconductor group had been hard-hit heading into the session, which amplified the rebound on the positive catalysts.
  • AMD's and Micron's own upcoming earnings are seen as the next definitive test of whether the move holds.

Strong earnings from Lam Research, Microsoft, and Arm reversed a run of selling pressure across semiconductor stocks, with Lam Research (LRCX) advancing 17% in the session. AMD (AMD) and Micron (MU) surged alongside it. The three results together reset the tape for a group that had been hard-hit heading into the day.

The catalyst: three prints, one direction

Lam Research posted the headline move. The company's strong earnings drove a 17% advance, the kind of single-session gain that reflects results arriving well above what the market had priced. Microsoft (MSFT) and Arm (ARM) delivered strong prints of their own, and the combination gave semiconductor investors a broad-based signal rather than an isolated beat at a single name. When the tape gets three positive catalysts in the same session, the reaction spreads. AMD and Micron surged as the move carried across the group.

The position the sector was coming from

Chip stocks had been hard-hit before these results arrived. That context belongs in any honest reading of the session's gains. A sector carrying sustained selling pressure holds more potential energy going into a positive catalyst. Lam Research's 17% advance anchored the move, but the width of the rally across AMD, Micron, and the broader semiconductor group reflects the condition of the tape coming in alongside the earnings themselves.

What to watch

AMD and Micron moved on the strength of results they did not produce. Their own earnings remain the next definitive test for the group. The session reset the setup; those two prints will determine whether the move holds.

Related reading

About this story

Filed by the newsroom of MarketPR on July 31, 2026. Source: cnbc.com. Indicative figures are not investment advice.

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Frequently asked

How much did Lam Research stock rise?

Lam Research (LRCX) advanced 17% in the session, driven by strong earnings that arrived well above market expectations.

Which companies' earnings drove the semiconductor rally?

Strong earnings from Lam Research, Microsoft (MSFT), and Arm (ARM) drove the rally, giving investors a broad-based positive signal in the same session.

Why did AMD and Micron rise if they didn't report earnings?

AMD and Micron surged on the strength of results they did not produce, as the positive move from Lam Research, Microsoft, and Arm carried across the broader group.

What is the next test for the semiconductor group?

AMD's and Micron's own upcoming earnings remain the next definitive test and will determine whether the move holds.

What condition was the chip sector in before these results?

Chip stocks had been hard-hit and under sustained selling pressure before the earnings, which added potential energy to the rebound.