IBM’s Best Week in 24 Years

IBM gained nearly 16% last week. Best single-week move since October 2002. To put that number in context: a weekly advance of that size has happened exactly seven times in the company’s entire public history going back to 1967. The last comparable instance came near the floor of the dot-com collapse, when the stock was bouncing off generational lows. This time the backdrop looks nothing like that.

Wednesday was the trigger. The U.S. Department of Commerce announced $2.013 billion in CHIPS Act funding across nine quantum computing companies, and IBM walked away with $1 billion of it — the largest single allocation in the group. IBM matched it dollar-for-dollar with its own capital to launch Anderon, a standalone subsidiary the company is calling America’s first pure-play quantum foundry, to be built in Albany, New York. 300-millimeter wafer format. Real infrastructure. The market moved before the ink was dry on the Letter of Intent, which, worth noting, is still a Letter of Intent and not a signed agreement.

The quantum sector reaction was noisy across the board — Rigetti up 30.6%, D-Wave up 33%, Infleqtion up 31.4% on the day. IBM’s move was slower and, arguably, stickier. The company isn’t a pure-play lottery ticket. It’s a $150B enterprise with 95% of the Fortune 500 as clients, a Software segment growing 11% year-over-year, and Q1 2026 free cash flow of $2.22 billion — the highest print in a decade.

Slight tangent, but it matters: the generative AI book of business hit $12.5 billion at year-end 2025, up from $9.5 billion the prior quarter. That’s not quantum hype. That’s the existing business compounding quietly while everyone watches the headline.

IBM closed May 22 at $253.84. The 52-week range runs $212.34 to $324.90 — so despite this week’s surge, the stock is still in the lower half of where it’s traded over the past year. Volume on May 21 came in above 25 million shares, roughly three times the daily average. The 50-day recently crossed above the 200-day. Support sits in the $234–$248 range on any pullback.

Here’s the thing though. The six months following IBM’s historical 15%-plus weekly moves have been its soft spot. The stock has been up only about a third of the time over that window, with slightly negative average returns. The catalyst is real. The execution risk is also real. Anderon still needs definitive agreements. The LOI needs to close. Q2 earnings land around July 22 and the market will be watching Software margins closely.

Whether this week was the start of something or the high-water mark before gravity reasserts itself — that answer won’t come from the quantum announcement. It’ll come from the next two earnings calls.

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