Key Highlights

  • Micron Technology (NASDAQ:MU) traded at USD 935.95 on October 13, 2026, down 5.37% on 29.426 million shares (0.9 times the 3-month average), valued at USD 1.17 trillion, with a P/E of 14.07 and a PEG of -4.86.
  • Western Digital (NASDAQ:WDC) traded at USD 376.65 on October 13, 2026, down 2.66% on 9.341 million shares (1.2 times the 3-month average), valued at USD 147.225 billion, with a P/E of 16.93 and a PEG of -0.35.
  • Super Micro Computer (NASDAQ:SMCI) traded at USD 39.15 on October 13, 2026, down 2.09% on 38.388 million shares (0.9 times the 3-month average), valued at USD 27.667 billion, with a P/E of 13.35 and a PEG of 0.11.
  • UiPath (NYSE:PATH) traded at USD 13.38 on October 13, 2026, up 0.45% on 34.245 million shares (0.5 times the 3-month average), valued at USD 6.905 billion, with a P/E of 19.37 and a PEG of 0.94.

Micron Technology (NASDAQ:MU): Down 5.37% on a China Chip Scare

Micron Technology (NASDAQ:MU) fell USD 53.09 to USD 935.95 on 29.426 million shares, below its 3-month average of 32.843 million, so the drop came on ordinary volume. The catalyst is reported, not confirmed: published reports on October 12 and 13 described a design breakthrough at CXMT that could add memory supply and pressure prices, and Samsung, SK Hynix and the KOSPI fell sharply. On September 30 the company reported fiscal fourth quarter revenue of USD 54.23 billion, GAAP diluted EPS of USD 32.87, a gross margin of 86.8% and a USD 0.15 quarterly dividend payable October 29. Headlines on October 13 also pointed to a larger buyback authorization, which was not confirmed in a filing. Micron makes DRAM and NAND memory, and AI demand has pushed revenue sharply higher. Supply risk is the central issue: if Chinese output rises, memory prices could soften, and rapid capital spending raises that risk. A trailing P/E of 14.07 means about USD 14.07 is paid for each USD 1 of past-year earnings, inside the 0 to 20 band, and the one-year EPS growth filter passes easily given the surge.

Western Digital (NASDAQ:WDC): Down 2.66% After a UBS Cut

Western Digital (NASDAQ:WDC) fell USD 10.29 to USD 376.65 on 9.341 million shares, about 1.2 times its 3-month average of 7.65 million. The likeliest drivers are the UBS target cut on October 12 and the memory selloff linked to the Chinese chip reports, though neither is proven as the cause. Earlier in the month hard drive stocks fell on reports of Toshiba expanding capacity and a bidding contest for TDK's magnetic heads business, and the shares dropped about 11.9% on one day around October 3. Analysts at Citi, Bernstein, Morgan Stanley and Goldman Sachs argued the selloff was overdone. On October 7 the company announced fiscal first quarter results for October 22. Citi, Bernstein, Morgan Stanley and Goldman Sachs publicly argued that the selloff had been excessive. Western Digital makes hard disk drives that store the data behind cloud and AI services. Competition from Toshiba, pricing, customer concentration among cloud buyers and the cyclical nature of storage are the main risks. Trailing revenue is about USD 12.92 billion, up 35.7%, and net income about USD 9.29 billion, up about 399%, per published data, so the earnings growth filter passes.

Super Micro Computer (NASDAQ:SMCI): Down 2.09% on China News

Super Micro Computer (NASDAQ:SMCI) fell USD 0.83 to USD 39.15 on 38.388 million shares, below its 3-month average of 44.363 million. Two items are the likeliest drivers, though neither is confirmed as the cause. A published report on October 12 said a contractor connected to the company pleaded guilty in a scheme to divert AI servers to China, and the chip sector sold off on the CXMT memory reports. Company news was constructive: it appointed Shesha Krishnapura as an independent director on October 9, began shipping Nvidia Vera Rubin NVL72 racks on September 23, and unveiled a rack-scale open compute portfolio on October 13. Citi raised its target to USD 45 from USD 39 and Mizuho to USD 43 from USD 35, both Neutral. Super Micro builds modular AI and storage servers. Export compliance, customer concentration and low margins are the main risks, and the trade commission inquiry and law firm notices add uncertainty, though they are not findings. Trailing revenue is about USD 39.06 billion, up 77.8%, and net income about USD 2.2 billion, up 112.7%, per published data, so the earnings growth filter passes.

UiPath (NYSE:PATH): Up 0.45% After a Downgrade

UiPath (NYSE:PATH) rose USD 0.06 to USD 13.38 on 34.245 million shares, about half its 3-month average of 65.834 million, so the move is small and quiet. No release or analyst action dated October 13, 2026 was found. At its September 22 analyst day the company set long-term targets for a gross margin of 80% or more and an operating margin of 30% or more. BMO, TD Cowen, Canaccord and UBS cut targets to USD 15, USD 15, USD 14 and USD 14 on September 24 and 25, and DA Davidson downgraded on September 28. Between October 6 and 9 it was named a leader in Forrester, Everest Group and Gartner evaluations. UiPath sells an automation platform that combines robotic process automation with AI agents. The key risk is pricing: if AI agents reduce the number of paid automation seats or bots, revenue per customer could fall, which is the concern DA Davidson raised. Trailing revenue is about USD 1.72 billion, up 15%, and net income about USD 362 million, per published data, a large rise from a very low base, which is why the earnings growth filter passes.

Where Things Stand

The answer is that three of the four fell on a reported Chinese memory breakthrough, analyst cuts and a China export report, while one edged up on no news. Micron Technology (NASDAQ:MU) fell 5.37%. Western Digital (NASDAQ:WDC) fell 2.66% after a UBS target cut. Super Micro Computer (NASDAQ:SMCI) fell 2.09% after a reported contractor plea. UiPath (NYSE:PATH) rose 0.45%. Their P/E ratios run from 13.35 to 19.37, but only the PEGs of 0.11 and 0.94 are below 1, and both rest on distorted growth.