Micron Reverses 6.4% Gain as Yields Hit 19-Year High
Get the Finance newsletter
Daily finance — markets, central banks, M&A, the prints that move money. Free.
- Micron Technology (MU) rose as much as 6.4% intraday on July 31, 2026, before reversing to trade down 4.1% from the opening bell by 3:05 p.m. ET, ending the day near $823.03 with a market cap of about $930 billion.
- Apple's latest earnings showed no plans to shrink memory chip spending, with leadership telling investors the memory supply crunch fueling chipmakers' revenue growth will continue for the foreseeable future.
- Amazon raised its 2026 capital expenditure budget to $220 billion, joining Alphabet in reiterating that big-tech memory spending will not be trimmed.
- The Federal Reserve announced it would not raise interest rates this week despite persistent inflation, prompting a bond-market reaction that pushed yields to 19-year highs and dragged high-growth stocks like Micron.
- Even with the broader S&P 500 up 0.6% and the Nasdaq Composite gaining 1% on the day, Micron's high-beta profile left it exposed to the rate-driven selloff that followed the Fed's signal.
- Writer notes the bullish supply-crunch thesis is intact but flags the valuation as 'too rich,' hinting that memory-cycle durability alone may not justify a $930 billion market cap.
Why it matters: Two major AI-spending bulls — Apple's 'continuing memory crunch' guidance and Amazon's hike to a $220 billion 2026 capex budget — were unambiguously Micron-positive catalysts, yet the stock gave up a 6.4% gain and closed sharply lower, showing that a $930 billion chipmaker is now as exposed to 19-year-high bond yields as to chip-cycle fundamentals. For high-multiple memory names, this whipsaw signals that macro rates can override even company-specific tailwinds.
