After a wild and volatile summer, the S&P 500 finds itself in a tight range, coiled beneath all-time highs as we head into September—a month historically known for its weakness. The S&P 500’s recent behaviour suggests a potential breakout, but the question remains: which direction will it take?
A Roller-Coaster Summer
The S&P 500 hit new all-time highs in mid-July, fuelled by optimism surrounding strong corporate earnings and hopes for a resilient US economy. However, this euphoria was quickly followed by a near 10% correction in less than a month, rattling investor confidence. The sharp sell-off was a stark reminder of the market's inherent volatility, driven by concerns over interest rate hikes, geopolitical tensions, and the ever-present threat of inflation.
Yet, as quickly as the market fell, buyers swooped in, leading to a swift V-shaped recovery. This rapid rebound brought the S&P 500 back towards its all-time highs, demonstrating the market’s resilience and the underlying strength of the current bull market. But, over the past two weeks, the S&P 500’s price action has been characterised by a tight range, forming the narrowest weekly range in over seven weeks for two consecutive weeks. This price compression has set the stage for what could be a significant move.
S&P 500 Daily Candle Chart Past performance is not a reliable indicator of future results
The Nature of Price Compression
Price volatility is often cyclical, and after a high-volatility summer marked by dramatic swings, the S&P 500 is experiencing a period of low-volatility price compression. This kind of behaviour—coiling within a narrow range—typically precedes a significant breakout, as the market builds up energy before releasing it in one direction or the other. The question is whether the breakout will align with the longer-term bullish trend or if we will see a reversal.
The S&P 500’s dominant trend is undoubtedly bullish with the 50-day moving average comfortably above the 200-day moving average, indicating strong underlying momentum. Historically, price compression of this nature tends to resolve in the direction of the prevailing trend, which in this case, points to a bullish breakout. However, the market’s memory of the sharp sell-off that occurred at the July highs could act as a psychological barrier, creating a potential battleground for bulls and bears around these levels.
Seasonality: A Double-Edged Sword
While the technical setup may appear bullish, it's crucial to consider the impact of seasonality. Historically, September has been the weakest month for the S&P 500, with the index falling by an average of 0.6% since 1945, according to data from CFRA. This seasonal weakness could be a headwind for the market, as investors often become more risk-averse after the summer and ahead of the final quarter of the year.
On the other hand, November and December are typically strong months for the S&P 500, buoyed by the holiday season and year-end portfolio adjustments by institutional investors. If the market can navigate the choppy waters of September without a significant breakdown, the seasonal tailwinds in the final months of the year could provide the impetus needed to push the S&P 500 to new highs.
Average S&P 500 Performance by Month Past performance is not a reliable indicator of future results
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