Micron Technology falls 17.5%, about 4 times a normal day
Micron Technology closed down 17.5% on 5 November 2026, its largest one-day fall since at least 7 November 2024, the start of the daily closes we hold. The closes, the trading volume and what the company filed with the SEC around the move.
Checked before publishing: software matched every figure in this piece to the data it came from (Yahoo Finance daily closes for MU (delayed); SEC EDGAR: Micron Technology, Inc. 8-K, filed 5 November 2026). How we check
Written by software from the data shown, at 01:35 ET on 6 November 2026. Not edited before publication. How this is made
Closes, filings and official calendars
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Micron Technology, Inc. (MU) shares fell 17.5% on 5 November 2026. Below are the closes, how unusual the move was, and what the company filed.
The move
Micron Technology closed at $656.39 on 5 November 2026, down 17.5% from $795.23 on 4 November, its largest one-day fall since at least 7 November 2024, the start of the daily closes we hold. About 76.7 million shares traded on 5 November, 2.9 times the average of the 20 sessions before. In the 20 sessions to 4 November its daily changes had a standard deviation of 4.1% (20-day realized volatility of 64.3% a year), so the move on 5 November was about 4.3 times a normal day.
What the company filed
Filed with the SEC from 1 November to 5 November, as listed on EDGAR:
- 5 November: 8-K (Item 5.02, a change of directors or officers; Item 9.01, financial statements and exhibits).
Its earlier moves this size
Micron Technology’s latest earlier one-day falls of 13% or more in the daily closes we hold, since 6 November 2024: 3 April 2025, down 16.1%, and up 8.6% 20 sessions later; 19 December 2024, down 16.2%, and up 25.4% 20 sessions later. These are dates, not a pattern: a few moves say little about the next one.
What this note does not say
The filings do not give a reason for the share price move, and neither do we: this note puts the closes and the filings side by side. Every quarter Micron Technology has filed, each linked to its filing, is on the MU page at /s/mu.
Corrections (the text above is as first published)
- 2026-11-08: The “earlier moves” section said it gave Micron Technology’s latest earlier one-day falls of 13% or more since 6 November 2024, but it counted only moves our software had flagged as unusual against the 20 sessions before them, and skipped the latest 20 sessions. In the daily closes we hold there were 4 such falls since 6 November 2024; the latest 3 were 23 June 2026, down 13.2%; 5 June 2026, down 13.3%; 3 April 2025, down 16.1% (Yahoo Finance daily closes). Later notes count every move that size.
Sources
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Sources: Yahoo Finance daily closes and volumes (delayed) and the company’s own SEC filings. The volatility, volume and free cash flow comparisons are our calculations. General market information, not investment advice.
Note: Articles and community posts on PYE Markets are for educational and informational purposes only and are not financial advice.
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