International Business Machines Corp. (IBM (IBM)) just had a day for the history books — and not in a good way. On Tuesday, shares of the tech giant cratered 25.21%, closing at $217.07. That's the worst single-day loss in IBM's recorded history, even worse than the 22.96% plunge on Black Monday in 1987. The trigger? A surprise early earnings release that nobody asked for and nobody liked.

What Happened: Why IBM Stock Plunged

IBM decided to pre-announce its preliminary second-quarter results eight days before its scheduled report. The company wasn't required to do this — it just chose to rip the Band-Aid off early. And the numbers were ugly.

Preliminary revenue came in at $17.2 billion, well below the Street estimate of about $17.9 billion. Earnings landed at $2.93 per share, missing the consensus of $3.02. The stock opened down 22% and never recovered.

So what went wrong? IBM blamed a reprioritization of client capital spending toward memory late in the quarter, along with execution issues, large deal slippage, and cybersecurity concerns at customers. In other words, a perfect storm of bad news.

BofA Cuts IBM Price Objective

BofA Securities analyst Wamsi Mohan was among the first to react. He trimmed his price objective on IBM to $280 from $330 but kept a Buy rating. Mohan said he was "surprised by the magnitude of the topline miss" — a sentiment likely shared by many.

He cut his 2026 revenue estimate to $69.6 billion from $71.4 billion and earnings to $12.02 per share from $12.47. The 2027 estimate also fell, to $12.48 from $13.02. Mohan expects IBM to lower its full-year outlook, with Software now tracking mid-single-digit growth (including acquisitions) rather than the double-digit trajectory management had guided. Infrastructure is tracking a mid-single-digit decline.

Still, even at $280, the new price target implies a 29% upside from Tuesday's close. So it's not all doom and gloom — at least from BofA's perspective.

The Street Splits: From Bullish to Bearish

BofA wasn't the only firm to move on Tuesday, and the Street didn't move in one direction. It was more of a scatter plot.

HSBC downgraded IBM to Reduce from Hold and slashed its price target to $191 from $231. That's now the lowest target on the Street and roughly 11% below where the stock currently trades. Ouch.

On the other end of the spectrum, Oppenheimer reiterated an Outperform rating and raised its price target to $350 from $320. Morgan Stanley maintained Equal-Weight but lifted its target to $293 from $267. Susquehanna, which initiated coverage just last week on July 10, kept a Neutral rating and a $303 target.

The consensus rating on IBM still stands at Outperform, with a consensus price target of $300.47. But the range now spans $191 to $375 — a 96% gap between the most bearish and most bullish targets. On a mega-cap stock. That's a lot of disagreement.

Historical Episodes of IBM's Double-Digit Daily Drops

Since 1968, IBM has fallen at least 10% in a single session eight times, including Tuesday. So what does history say happens next? The answer is: it depends on your time horizon.

In the short term, the news is actually pretty good. One month out, IBM averaged a 6.75% gain with a 71.43% win rate and a median gain of 11.18%. Three months out, the average was 9.26% with the same hit rate and a median of 12.24%. Both beat IBM's unconditional baseline over the same windows by a wide margin — 0.69% and 2.01%, respectively.

Then the edge disappears.

Six months out, the average return falls to 1.71% — below the unconditional 3.92%. Twelve months out, the average is 7.15%, which is actually below the 8.13% IBM delivered over any random year. The win rate climbs to 83.33% at twelve months, but the median falls to 4.08%. So investors win more often but make less. Not exactly a compelling trade.

The strongest single observation is March 12, 2020, the only date positive across all four horizons with double-digit gains at each: 17.84%, 18.58%, 18.75%, and 24.12%. But that was the Covid-19 crash, with a massive policy backstop arriving days later. It's the least applicable case in the set.

The failures are more instructive. After April 8, 2002, IBM lost 18.43% over three months and 34.73% over six. After December 15, 1992, it lost 14.03% in a month and 11.14% over six. Both were company-specific breaks in a business model investors had assumed was structurally protected. Sound familiar?

So what's the takeaway? If history is any guide, IBM might bounce back in the next few weeks — but the longer-term picture is murky. And with Wall Street so divided, the only thing certain is uncertainty.