Although the S&P 500 has gained 17% over the past 8 weeks, the instinctive reaction across Wall Street has been familiar: brace for a pullback. Yet, the historical record, as compiled by research firm Creative Planning, points in a direction most market watchers would not guess.
According to a Creative Planning analysis posted by Daily Chartbook on X, the 8-week run that just unfolded for the S&P 500 ranks as the 20th biggest 8-week gain for the index since 1950. That is rarefied air across more than seven decades of trading history. However, what tends to follow stretches like this isn’t the snapback that you might expect.
This piece walks through Creative Planning’s forward-return averages and what they suggest about the asymmetry between investor expectations and historical outcomes. The numbers tell a different story than the typical bearish forecast.
An 8-Week Sprint That Lands in the History Books
The benchmark S&P 500, tracked by many retail investors through the SPDR S&P 500 ETF Trust (NYSEARCA:SPY | SPY Price Prediction), just posted a 17% gain over the past 8 weeks. Creative Planning’s data set spans January 1950 through May 2026 and ranks this stretch as the 20th out of every rolling 8-week window in that span.
Most investors carry an instinctive expectation that markets revert. After a sharp move higher, the natural assumption is that the trend has borrowed from future returns, leaving the index vulnerable to digesting its gains.
The result is uncomfortable for the mean-reversion camp. Stretches like this one have historically been continuation events more often than exhaustion events for the S&P 500.
What Has Historically Followed Rallies This Big
Creative Planning’s analysis isolates every prior instance of an 8-week rally of this magnitude and tracks the S&P 500 forward across three windows. The pattern is consistent across all three.
Over the three months following these large 8-week rallies, the S&P 500 has averaged a gain of 10%, compared with a 3% average for all other 3-month periods, per Creative Planning. Over the six months after, the index has averaged 14%, compared with 5% for all other 6-month periods. Over the full 12 months after, Creative Planning’s figures show an average gain of 27%, against 11% for all other 12-month periods.
Across every horizon Creative Planning measured, the forward average after a big short-term rally has been materially higher than the baseline. Momentum, at this kind of magnitude, has historically tended to compound rather than reverse for the S&P 500.
The Honest Caveats
“On average” is doing real work in these figures. Averages hide outliers, and the 20th biggest 8-week rally since 1950 implies a relatively small sample of comparable historical instances. Individual cases within that sample may have looked very different from one another in their forward paths.
The current macro backdrop is its own story. The Federal Reserve has the Federal Funds target rate upper bound at 4%, the 10-year Treasury yield sits at 5%, and the University of Michigan Consumer Sentiment reading is 49.8, deep in pessimistic territory. Creative Planning’s data set covers many cycles, but no single prior episode mirrors today’s exact mix of rates, sentiment, and AI-driven capital spending.
“Momentum begets momentum” is one explanation for the pattern, though it isn’t the only one. Some past instances were recoveries from oversold conditions, where the rally itself signaled that risk was being repriced higher. Others were stages of speculative manias that eventually corrected, even if the 12-month forward return remained positive on average.
What the Pattern Means, and What It Doesn’t
The takeaway from Creative Planning’s work serves as a counterweight to the reflexive “we are due for a pullback” narrative that tends to dominate Wall Street commentary after a sharp move higher in the S&P 500. It frames the historical context rather than offering a buy signal for any individual security.
The VIX closed at 16.59 on May 25, comfortably inside the normal 15-to-20 range, which suggests that the options market isn’t pricing in a near-term volatility spike for the S&P 500. That calm is consistent with the kind of environment that tended to follow previous 8-week rallies, though it offers no guarantee about which path the current cycle will follow.
The Real Surprise
The real surprise lies in the asymmetry between what investors expect after a stretch like this and what has historically followed according to Creative Planning’s data. Big rallies haven’t reliably preceded the pullbacks that one’s intuition might suggest.
The cautious instinct is reasonable, and at times it has been correct. The historical record compiled by Creative Planning simply hasn’t rewarded that instinct on average at this specific magnitude in the S&P 500.
The deeper lesson is about humility toward intuition. Reflex-driven narratives about overbought markets feel right because they fit a tidy story about gravity returning to prices. Creative Planning’s seven-plus decades of S&P 500 data tell a less tidy story, and one worth carrying into the next rally that feels “too far, too fast.”
