December is often seen as a favorable month for investing in stocks. It tends to bring a sense of optimism, highlighted by the idea of the Santa Claus rallies, making it one of the best periods for the market. Historically, the S&P 500 has seen an average gain of about 0.6% during this month over the last two decades.
While this pattern is encouraging, it doesn’t necessarily apply across the board. Before diving into holiday trades, investors should consider potential pitfalls, especially regarding Exchange-Traded Funds (ETFs), which might face their own set of challenges in December.
The Financial Select Sector SPDR ETF (NYSEMKT: XLF) stands out as the largest of its kind, but it might be a riskier option to hold onto as the month unfolds. It’s essential to dig deeper into why that might be.
Even though this sector ETF has shown strong results so far this month, with almost a 3% increase, December has traditionally shown mixed performance. Since 2010, it recorded an average gain of 1.47%, but that doesn’t entirely assure comfort.
Concerns linger, especially when considering that two key holdings—US Bancorp (NYSE: USB) and Moody’s (NYSE: MCO)—have struggled in late December over the years, which complicates the outlook for this ETF.
Another factor is the Federal Reserve’s recent interest rate cuts, which, while generally seen as a boost for the market, can squeeze banking and insurance profits. Since more than 40% of this ETF consists of those sectors, this becomes a critical risk.
And let’s not forget about consumer behavior during the holiday season. If people dial back their spending, particularly on credit, it could hurt the ETF. After all, four of the biggest U.S. credit card providers are among its top holdings, so less consumer spending could mean more pressure.

