Should You Sell Stocks in September? Expert Outlook After Historic Rally

Analyzing the Historic Market Rally

The S&P 500 just delivered its second-best May-August performance in over a decade, surging 11.75%. This remarkable rally aligns perfectly with world champion trader Kevin McCormack's prediction from four months ago. But as we enter September—historically the market's weakest month—experienced investors face a critical decision: Should you sell positions or prepare for buying opportunities? Our analysis combines McCormack's technical indicators with seasonal data to navigate this inflection point.

Seasonal Patterns: Historical Context Matters

Seasonal charts reveal recurring market rhythms. While not infallible, they've accurately predicted turning points throughout 2023. The tariff tantrum selloff occurred slightly later than seasonal models suggested, but the subsequent recovery matched expectations precisely. As McCormack notes: "We're now entering the phase where markets typically see a final small rally or turnover before declining into mid-October." This pattern held true in 2018 (9.75% May-Aug gain) and 2020 (over 20% gain), both followed by negative Septembers. When August is strongly positive, September tends to underperform 78% of the time since 1990—a trend demanding attention.

Demark Indicators Signal Exhaustion

McCormack's analysis of monthly S&P 500 charts reveals critical technical warnings:

1. Combo 13 exhaustion signals flashed in July, historically preceding pullbacks
2. Strong August gains correlate with September declines in 4 of the last 5 instances
3. The 2023 rally mirrors 2018's structure before its 9% Q4 drop

"This doesn't predict a bear market," McCormack clarifies, "but suggests digestion in September-October." His proprietary analysis shows these indicators preceded major moves, like December 2022's signal before January's 7% rally. The current setup implies a pause, not a collapse.

Strategic Positioning for Volatility

McCormack is accumulating cash ("dry powder") to capitalize on potential dips—a tactic individual investors can emulate. Consider these actionable steps:

• Review portfolio allocations: Trim outperforming stocks that hit price targets
• Identify support levels: Note where quality stocks would become attractive buys
• Dollar-cost-average cautiously: Scale into positions during pullbacks

Three critical tools for this phase:

1. TradingView (real-time Demark scripting)
2. Seasonal Charts by StockTrader's Almanac
3. Volatility Index (VIX) alerts for entry timing

Why This Pullback Could Be Your Best Opportunity

McCormack maintains a bullish long-term view: "This digestion period sets up a buying opportunity to ride the next bull leg." Historical data supports this—since 1945, Q4 averages 4% gains after rocky Septembers. The key is distinguishing between normal consolidation and fundamental breakdown.

Execute this 3-point checklist now:
✅ Confirm your core holdings' earnings stability
✅ Set price alerts at 5% below key support levels
✅ Allocate 10-15% cash for tactical opportunities

"I'm preparing to buy the dip," McCormack states, "because bull markets climb walls of worry." His approach combines technical discipline with macroeconomic awareness—monitor Fed policy shifts and earnings revisions as catalysts.

Conclusion: Navigating the September Shift

The 11.75% summer rally creates favorable conditions for a healthy pullback. Seasonal patterns and Demark indicators suggest September-October weakness, but not a bear market. This aligns with McCormack's strategy to trade cautiously while positioning for long-term gains. As volatility emerges, focus on high-quality companies with strong balance sheets—they’ll lead the next advance.

What's your biggest concern about September's market?
Share your outlook below—do you see a buying opportunity or reason for caution?