Most market participants are familiar with the term “Santa Claus rally,” which refers to the tendency for stocks to perform better as the year draws to a close. Whether you call it the Santa Claus rally, window dressing, or something else, there appears to be a general positive bias among investors during the festive period. But is this phenomenon a genuine market trend or simply a psychological bias developed over time?

To examine this question, a seasonal approach is useful. Looking at the S&P 500’s performance during Christmas week over the past two decades provides some clarity. Here is a summary of the weekly returns during this period:

2024: +0.7%
2023: +0.3%
2022: -0.1%
2021: +2.3%
2020: -0.2%
2019: +0.6%
2018: +2.9%
2017: -0.4%
2016: -1.1%
2015: +2.8%
2014: +0.9%
2013: +1.3%
2012: -1.9%
2011: +3.7%
2010: +1.0%
2009: +2.2%
2008: -1.7%
2007: -0.4%
2006: +0.5%
2005: +0.1%

The average weekly performance during Christmas week stands at approximately +0.65%, indicating that there is some historical justification for the so-called Santa Claus rally.

However, it’s important to remember that correlation does not imply causation. Traders should be cautious in assuming that stock gains during Christmas week are guaranteed. For example, the period between Christmas and New Year has displayed variability; in 2024, the S&P 500 recorded its first loss in the interim period between the holidays for the first time in seven years. Furthermore, consecutive yearly losses during Christmas week are relatively rare, but they do occur.

This data suggests that while a positive trend often exists, it does not guarantee future gains. Traders should avoid falling prey to the “hot hands fallacy” — the mistaken belief that recent winning streaks improve future outcomes.

Recent market dynamics add complexity. The Federal Reserve’s seemingly more hawkish rate cut this month has moderated some recent market optimism. Additionally, concerns about an AI-related bubble persist, yet stocks have held up reasonably well. The S&P 500 is still on track for an estimated 16% gain for the year—a significant figure that overshadows any seasonal rally.

In summary, although a historical pattern of gains does exist during the festive period from Christmas through New Year, upcoming challenges such as tighter liquidity, Fed policy uncertainties, and AI-driven market concerns suggest that 2025 might not follow this trend. For forex traders, this means the end-of-year period could be more volatile and less predictable than past seasonal patterns imply.

Therefore, while the Santa Claus rally remains a useful seasonal concept, it should not be relied upon as a certainty. This period can see wide-ranging market moves, and traders should maintain a cautious and flexible approach.

Original Source: Justin Low of investinglive.com