nasdaq
A new review of 10 previous Nasdaq corrections found that additional losses were common in the following month, although the index generally recovered over six months. Imen Ben Youssef/Hans Lucas

The Nasdaq Composite's plunge into correction territory on Thursday has left investors facing an uncomfortable historical pattern of the first major drop being followed by more selling before a sustained rebound emerges.

The technology-heavy index fell more than 5% Thursday, finishing more than 11% below its October record. The retreat crossed Wall Street's correction threshold, a decline of at least 10% from a recent peak. A drop of 20% marks a bear market.

For investors wondering what comes next, past corrections offer reasons for patience, but little assurance that the worst is already over.

A CNBC analysis of 10 previous Nasdaq corrections over the past decade found that several episodes brought additional losses during the following month. Corrections in 2025, 2022, 2020 and 2018 all featured further selling over that period.

Yet the picture generally improved over longer stretches. Among those episodes, the index had returned to gains after six months in every case except 2022, according to the analysis. Across the historical sample, there were average gains of 9.41% over three months and 17.03% over six months from correction bottoms.

Returns measured from a bottom describe what happened after the lowest point was reached. They do not establish that the day an index enters correction territory is its low, or that investors buying immediately will capture the same gains.

The market can cross the 10% threshold, briefly recover and then fall again before a lasting advance begins. The January 2022 correction illustrates how much worse the outcome can become. In that episode, the Nasdaq fell another 18.3% over the following six months and was down 24.3% a year later.

Those losses show why historical averages cannot establish a recovery timetable. A collection of strong rebounds can produce an encouraging average even when one episode delivers prolonged damage.

This week's sell-off centers on concerns about the artificial intelligence investment boom following Democrats' victories in Tuesday's midterm elections. Investors are assessing whether changes in political leadership could bring tighter restrictions on data centers, slowing construction and weakening growth expectations for companies supplying the AI expansion.

Texas became a particular focus after Gina Hinojosa won the governor's race following a campaign that included a proposed immediate moratorium on data center development. The market's concern involves potential policy changes, rather than proof that construction has already stopped.

Semiconductor shares absorbed especially steep losses Thursday. The iShares Semiconductor ETF, known by its ticker SOXX, dropped 12%, its worst session since March 2020, according to CNBC.

Election history provides another perspective on the potential recovery, although it measures a different period from the correction analysis. Frank Cappelleri, founder of technical analysis firm CappThesis, told CNBC that the Nasdaq was higher 12 months after the election in all but one of 13 midterm cycles dating to 1974.

"The caveat is that the path can be a volatile one," he said. He cited 2018, when stocks initially rose after Democrats won the House. A sharp December decline followed, yet the Nasdaq ultimately stood about 15% higher a year after the election.