Pre- and Post-Memorial Day Seasonal Patterns in US Stock Indexes

Memorial Day weekend (May 23-25, 2026) has become the unofficial start of summer for many Americans, marking a notable transition in financial markets. In recent years, trading activity typically begins a gradual decline shortly afterward—barring major external events—toward a later summer low. 

 

Over the past 20 years, the Thursday before Memorial Day has delivered the strongest average gains across major indices (DJIA +0.07%, S&P 500 +0.18%, NASDAQ +0.34%, Russell 2000 +0.32%). Friday shows a solid percentage of up days—particularly for the NASDAQ (66.7%, +0.38% average)—but with more mixed overall performance. Wednesday is the weakest, with negative average returns. The dataset includes 2025; both median returns and win rates also tend to favor Thursday in several cases.

Market participants refer to this summertime slowdown as the summer doldrums, characterized by anemic volume and often uninspired, range-bound trading on Wall Street. Seasonal volume patterns since the 1960s for the NYSE and 1970s for the NASDAQ show this typical lull, with daily trading volumes frequently dropping 20-40% from winter peaks, reaching troughs particularly in late July and August as vacations reduce institutional participation.

In the lead-up to the holiday, historical performance presents mixed yet distinctive results. Thursday before Memorial Day has consistently delivered the strongest average gains across the DJIA, S&P 500, and Russell 2000 in 21-year analyses. Friday, the last trading day before the long weekend, records a higher proportion of advancing sessions for most major indexes, with the NASDAQ standing out at a 66.7% win rate, an average gain of 0.38%, and nine up closes in the last ten years. That said, this Friday session also tends to feature lackluster, light-volume trading. For the DJIA, results have been essentially neutral over extended periods, with an even split of up and down closes and a modest average decline of approximately 0.05%.

 

 May Stock Market Performance in Midterm Election Years:

Early May Strength Turns to Chop Until Late Month Pop.

Following the holiday, market behavior often turns more muted and, in recent decades, weaker. The Tuesday after Memorial Day has shown notable softness, with the DJIA and S&P 500 declining in seven of the last nine observed years, alongside more frequent losses in the NASDAQ and Russell 2000. Broader post-holiday windows, including the full trading week after Memorial Day, performed robustly from the early 1970s through the mid-1990s but have since weakened considerably, with reduced frequency of positive returns and smaller average gains, especially since the late 1990s and after 2010. An event study of returns spanning three days before to three days after the holiday generally aligns with long-term daily averages, showing no pronounced anomaly.

Beyond the immediate sessions, the broader period from Memorial Day to Labor Day (September 7, 2026) has historically produced net positive, albeit modest, results for the S&P 500. The index has advanced in roughly 70% of periods since the early 1970s, with average gains typically ranging from 1.6% to 2.8%. This summer window fits within the broader “Sell in May and Go Away” tendency, during which overall returns tend to be softer than in the November-to-April period, even as the Memorial Day-to-Labor Day segment itself often contributes positively amid the lighter volumes of the doldrums.

 

 S&P 500 Midterm Election Year Seasonal Pattern, 1949-2024.

 
In midterm-election years such as 2026, these summer patterns can intersect with the broader presidential cycle, which historically features heightened volatility and often subdued returns. Midterm years frequently see notable market lows forming between late July and mid-August, aligning with the depth of the summer doldrums, reduced liquidity, and pre-election political uncertainty. Such periods have at times served as bottoming phases, setting the stage for stronger recoveries later in the year or into the following pre-election period, though outcomes vary with prevailing economic and geopolitical conditions.

 

Reference:
Jeffrey A. Hirsch (May 19, 2026) - Trading Mixed Before Memorial Day Weekend.
Jeffrey A. Hirsch (May 1, 2026) - May Stock Market Performance in Midterm Election Years.
Jeffrey A. Hirsch (July 8, 2024) - Summer Doldrums Have Arrived - Market Volume Likely to Continue Fading.
Jeffrey A. Hirsch (December 29, 2025) - 2026 Midterm Election Year Seasonal Patterns of US Indices.
Meghan Nalty-Roach (May 01, 2025) - How Memorial Day Impacts the Markets.

 

 

» The bull capitulation is almost complete. «

 

See also: 

David Hickson (May 18, 2026) - Hurst Cycles Update: SPX, NDX, ASX, DAX, NIFTY, Gold, Bitcoin. 

TPR (May 1, 2026) - Cosmic Cluster Days | May 2026.

Seasonal Odds Favor S&P 500 Gains Next Week (May 2–9) | Wayne Whaley

The S&P 500’s performance during the week of May 2–9 (Sat-Sat) has historically been fairly neutral over the past 51 years, posting 28 advances and 23 declines for an average gain of just 0.09%. 

 

» Seasonal evidence alongside recent momentum points modestly in favor of higher prices over the coming week. «

 

► 51-year May 2–9 performance: mostly neutral (+0.09% avg; 28 up / 23 down)
► Overall seasonal and momentum bias: modestly bullish for next week
► First half of May often mirrors first half of April behavior
► 2026 April (Apr 1–16): strong +7.09% advance
► Strong April (>1.68%) historically: 15 up / 2 down in following week

► Weak April (<-0.45%) historically: 6 up / 11 down in following week
► Closest strong April cases (2009, 2020) saw +5.89% and +3.50% gains

 

However, a broader set of seasonal studies suggests that stronger recent price trends tend to support continuation, implying a bias toward further gains in the coming week. Notably, the first half of May has often behaved similarly to the first half of April, reinforcing the relevance of the recent April setup.

In the data breakdown, May 2–9 returns are grouped into three 17-year categories based on the S&P’s performance from April 1–16 over the same 51-year history. In 2026, the index rose 7.09% during that April window. In the 17 prior instances where April 1–16 gains exceeded 1.68%, the S&P advanced in 15 of the following May 2–9 periods versus only 2 declines. By contrast, when April 1–16 was weaker than –0.45%, the next-week record flipped to 6 up and 11 down. More specifically, in the two historical cases most comparable to 2026—2009 and 2020, both with April gains above 5%—the S&P followed with strong May 2–9 advances of 5.89% and 3.50%, respectively.

The accompanying ratings system scales outcomes into -3 to +3 standard deviation bands on a -100 to +100 framework, with outliers down-weighted to better reflect typical behavior; readings below -50 or above +50 are treated as trade-alert conditions. While multiple non-seasonal factors can certainly influence market behavior, the combined seasonal evidence alongside recent momentum points modestly in favor of higher prices over the coming week.

Reference:

Wayne Whaley (May 2, 2026) - Whaley-AI analysis of the seasonal odds for the S&P next week (May 2–9).

 

S&P performance after a 10% calendar month: "For me, from a directional signal perspective, it is a bull friendly development but more so because it occurred in the barometrically important month of April than the fact that it was a rare double digit month."

See also:

Jeffrey A. Hirsch (May 1, 2026) - May Stock Market Performance in Midterm Election Years.

May Stock Market Performance in Midterm Election Years | Jeff Hirsch

The S&P 500 has posted gains during the first three trading days of May in 19 of the past 28 years.

 

Early May Strength Turns to Chop Until Late Month Pop.

Weakness often emerges around the May 6 (Wed),  May 8-12 (Fri-Tue), and after May 18 (Mon). The final four days usually post solid gains (May 26-29, Tue-Fri), though the last day of May has been notably weak.

 

In midterm election years, May typically starts higher but turns broadly weak by May 5 (Tue), with softness persisting through most of the month.

 

Reference:

Jeffrey A. Hirsch (May 1, 2026) - Early May Strength Turns to Chop Until Late Month Pop.

 

 S&P 500 Midterm Election Year Seasonal Pattern, 1949-2024. 

 

S&P 500 Average Performance and Hit Rate per Day (1928-2024). 

   

In the Four-Year Presidential Cycle, May of midterm election years has historically been the weakest,

with all major indices avg. declines: DJIA –0.08%, S&P 500 –0.63%, NASDAQ –0.76%, NYSE –1.19%.

  

Historical S&P 500 data shows May averages just 0.38% gain since 1950 overall, but improves to 2.58% average and

9-1 record in the 10 years with April gains of 5% or higher, including the last seven straight positives post-1985. 

 

When the S&P 500 closes April at a new all-time monthly high since the early 1960s (17 instances shown), 
the remainder of the calendar year has been positive 100% of the time with an average gain of +10.35%. 

 

 

See also: 

Jeffrey A. Hirsch (December 29, 2025) - 2026 Midterm Election Year Seasonal Patterns of US Indices.

Alex Krainer (April 27, 2026) - S&P 500 Dumb Money Confidence Enters Extreme Optimism. 

@Fiorente2 (April 20, 2026) - DJIA 2026 vs Top Three Midterm Correlated Years Since 1886.

Namzes (April 19, 2026) - S&P 500 Bear Outlook Intact: Q3 3.5-Year Hurst Cycle Low. 

Nicholas D. Savino (May 2, 2026) - S&P 500 Forecast for May 2026.

DJIA 2026 vs Top Three Midterm Correlated Years Since 1886 | @Fiorente2

Plotting all 35 midterm-election years for the DJIA since 1886, the spread of outcomes is enormous: In difficult midterm years, the DJIA has fallen by as much as 25% (1966), while in stronger years it has gained up to 45%. The average of ±2% is likely the most realistic expectation right now, given the current environment.

 

Chart 1: DJIA 2026 versus the Top Three Midterm Correlated Years:

1898 = approx. +20% (correlation 0.764); 1926 = ended the year flat (0.716); 1966 = approx. -20% (0.826). 

However, to get a sharper view, the three midterm years with the highest correlation to 2026 DJIA performance (from January through last week) were selected and charted: 1966, 1926, and 1898 (Chart 1).  

• 1966 has the strongest correlation (0.826).  
• 1898 (0.764) is the bullish outlier: if 2026 follows that path, the market could go bazooka from here.  
• 1926 (0.716) sits in the middle, and curiously, its path aligns with the average of the top three.

 

Chart 2: DJIA 2026 vs 1966 and Top Three Composites. In 1966, the DJIA printed its yearly low in early October.

  

Each of these years carries its own resonance: 

• In 1898, the US was just emerging as a global power through victory in the Spanish-American War. 
• In 1926, an industrial revolution was reshaping the economy. 
• In 1966, tariffs, war, inflation, and a punishing midterm election defined the landscape.  

The bias points toward 1966 (Chart 2): The correlation is the strongest, and the themes are too close to ignore: tariffs, a costly overseas conflict with no clear exit, inflation concerns, and a midterm election that may punish the incumbent party. 

 

Reference:
@Fiorente2 (April 20, 2026) - A US Midterm forecast on the DJIA.

 

Berkshire Hathaway's cash position has risen to a record above $370B, underscoring a scarcity of attractive valuations and ongoing reductions in holdings such as Apple. Warren Buffett has described recent market pullbacks as modest relative to historical downturns, drawing parallels to the elevated cash levels he maintained ahead of the 1999 dot-com crash and the 2007 financial crisis—periods when major equities ultimately fell by 80–90%.

See also:

@Fiorente2 (April 20, 2026) - An Update on the DJIA and the Jupiter-Saturn Cycle.

@Fiorente2 (March 16, 2026) - The 60-Year Cycle in US Stock Indexes Revisited.

Jeffrey A. Hirsch (March 23, 2026) - Trump Presidency Seasonal Cycle Pattern: Q1 Shock. Q2-Q4 Awe.

Jeffrey A. Hirsch (December 29, 2025) - 2026 Midterm Election Year Seasonal Patterns of US Indices.

Namzes (April 19, 2026) - S&P 500 Bear Outlook Intact: Q3 3.5-Year Hurst Cycle Low.

S&P 500 After Rapid 10% Gains: +17% Avg One-Year Return | Alex Krainer

Historical S&P 500 data shows that sharp 10% rallies over a 10-day span tend to exhibit strong follow-through. On average, returns have been approximately +0.6% after one week, +2.5% after one month, and +17% over the following year.

Rapid 10%+ bounces in the S&P 500 (weekly candles), 1980 to 2026.

A review of the weekly S&P 500 chart from 1980 to 2026 highlights multiple instances of these "rapid +10% bounces," marked by green and red arrows. In most cases, these moves were followed by continued upside, though there were notable exceptions—such as the period around 2000.

 

Alex Krainer argues that the current setup differs meaningfully from the 2000  episode. He notes the absence of broadly synchronized overbought conditions among megacap stocks today, and emphasizes that the more significant declines in 2000 occurred only after the index had already fallen below its 40-week moving average.
 

S&P 500 RSI readings above 70 have led to pullbacks in 8 of the last 10 cases over two years, with the other two resulting in flat consolidation. The daily chart (May 2024–April 2026) marks these signals with red arrows for pullbacks and one green arrow, alongside recent price action near 7,000. This suggests an 80% likelihood of a near-term pullback, though prior corrections since the 2025 rally have been relatively mild.

Reference:
Alex Krainer (April 16, 2026) - Rapid S&P 500 10% rallies in 10 days historically show strong follow-through. 

 

Jeffrey Hirsch notes that the S&P 500's 7.57% gain in the first 10 trading days of April 2026 ranks as the second-strongest start to April since 1950.

Gains averaged +10.8% for the rest of the year, with full-year returns positive in 91.7% of cases (+16.2% avg.).

Historically, such powerful early-April momentum has been a bullish signal: in 20 of 24 comparable cases (83.3%), the market delivered further gains over the remainder of the year, with an average advance of +10.8%. Full-year returns were positive in 22 of those 24 instances (91.7%), averaging +16.2%. Hirsch’s data also segments April starts into performance tiers, with 2026 firmly in the top group—where subsequent returns have consistently outpaced those seen in the middle and bottom tiers.

DJIA Up in 77.3% of April OpEx Weeks Since 1982 | Jeff Hirsch

April's monthly option expiration is generally bullish across the board, with respectable gains on the last day of the week, the entire week, and the week after. Since 1982, DJIA has advanced 28 times in 44 years on monthly expiration day, with an average gain of 0.20%. 

 

DJIA has risen in 34 of the past 44 April options-expiration weeks (next week), with an average gain of 1.00%. The S&P 500 and NASDAQ also show strong seasonality, averaging weekly gains of 0.77% and 0.76%. Losses in 2022, 2024, and 2025 have tempered the longer-term averages. 

 DJIA Up in 77.3% of April OpEx Weeks since 1982.

 

 

S&P 500 Up in 65.9% of April OpEx Weeks since 1982.

S&P 500 has a similar record, also with 28 advances and an average advance of 0.15% on monthly expiration day. Monthly expiration day was trending solidly bullish after four or five declines from 2014 to 2018, but took hits in the 2022 bear market, 2024, and in 2025 due to Liberation Day tariff uncertainty.

NASDAQ Up in 63.6% of April OpEx Weeks since 1982.

 

Monthly expiration week also has a bullish track record over the past 44 years. Average weekly gains are +1.00% for DJIA, +0.77% for S&P 500, and +0.76% for NASDAQ. The bullish bias of April monthly expiration also persists during the week after, although average gains have not been as strong, with selling pressure rising (from 2018 to 2022). However, strength has returned since 2023. NASDAQ jumped 6.73% in the week after in 2025.

► April seasonality strong: 2nd-best month for DJIA and S&P; 4th for NASDAQ.
► April 2026 started solidly (+0.52% DJIA, +1.98% NASDAQ) despite geopolitical tension, rising energy costs, April 15 tax deadline.
► Historically, early April outperformed—since 1994, strength shifted to second half.
► Post–April 15 stronger (especially NASDAQ, Russell 2000).

Reference:
Jeffrey A. Hirsch (April 10, 2026) - DJIA Up 77.3% of the Time During April Monthly Expiration Week since 1982.

 Jeffrey A. Hirsch (April 7, 2026) - Income Tax Deadline, Earnings Season & Iran War: Second Half of April Historically Better.

See also:

Jeffrey A. Hirsch (March 25, 2026) - April Stock Market Performance in Midterm Election Years.

S&P 500 in Wyckoff Markdown Phase | Major Low in July

In Wyckoff's Distribution Schematic, the S&P 500 (ES) has completed the Upthrust After Distribution (UTAD) and the Test of Upthrust (TOU) sequence near the upper boundary of the trading range (Phase D). 

 The blue circle marks the current location of the S&P 500.

 

Following the Last Point of Supply (LPSY – Return to ICE) and the Major Sign of Weakness (MSOW), the S&P transitioned into clear Failure to Improve and Markdown type price action (Phase E) outside the trading range (Phases A to D). The decline is characterized by repeated failures to reclaim prior support levels, expanding supply, and the absence of sustained demand sponsorship. 

 

The Eternal Recurrence of the Same Wyckoff Cycle.

Any rally and retracement in April will likely be choppy and shallow and reflect Re-Distribution within the current Markdown Phase, which is expected to resume into July or even October. Measured from the April 2025 low to the January 2026 high, the absolute minimum downside target for the ES markdown is the 50% retracement near 5,940; however, in 2026 a deeper decline of 20%+ to around 5,350 or 4,830 is far more likely.

 

See also:

Alex Krainer (March 27, 2026) - Classic S&P 500 Smart Money vs Dumb Money Rebound Setup. 

Jeffrey A. Hirsch (March 25, 2026) - April Stock Market Performance in Midterm Election Years. 

Branimir Vojcic (March 23, 2026) - S&P 500 Outlook: Late March Low, May Peak, October Low.

TPR (March 19, 2026) - 20-Week Cycle Low in the S&P 500 and US Stock Indexes | Major Low in July.

April Stock Market Performance in Midterm Election Years | Jeff Hirsch

Over the past 21 years (solid lines in the chart below), April has exhibited a pattern of steady gains starting around April 7 (Tue)(Trading Day 5) and continuing through the end of the month, with only minor fluctuations along the way. Overall, it has generally finished positive across the board.

 

Midterm election years since 1950 (dashed lines) show strength from April 7 (Tue) through mid-April only, followed by choppy trading that typically ends the month flat or in negative territory.

 

Reference:

Jeffrey A. Hirsch (March 25, 2026) - April Weaker in Midterm Election Years.

 

S&P 500 Midterm Election Year Seasonal Pattern, 1949-2024.

  

See also:

Jeffrey A. Hirsch (December 29, 2025) - 2026 Midterm Election Year Seasonal Patterns of US Indices. 

Nicholas D. Savino (April 1, 2026) - April 2026 S&P 500 Forecast.

S&P 500 Outlook: Late March Low, May Peak, October Low | Branimir Vojcic

The S&P 500 cycle composite of the dominant 339, 185, 124, and 79-day cycles forecasts a reversal by late March. This move is expected to manifest as a "dead cat bounce," peaking near 6,500 in late May before a projected decline into October.

 

 

Bill Sarubbi notes that post-OPEX weeks in March are traditionally bearish, projecting a low for the S&P 500 and US stocks between March 26 (Thu) and April 7 (Tue).

 

Sarubbi's S&P 500 cycle composite forecast for 2026 started at a January peak, followed by a choppy decline through June, punctuated by a brief April recovery. After a late-summer bounce, the market hits its annual low in late September/early October. The year concludes with a sharp rally through December, carrying bullish momentum into 2027. 

 

Reference:

Branimir Vojcic (March 22, 2026) - S&P 500 Cycles Update.

Bill Sarubbi (March 20, 2026) - Post-OPEX weeks in March.

 

The best timed trade of 2026.