Edward Jones: S&P 500 Historically Gains 15.5% After Midterms

Edward Jones reports that the S&P 500 index has averaged a 15.5 percent gain in the six months following midterm elections since 1970. The financial firm analyzed data from the last 14 midterm races to determine this trend. In the month immediately after these elections, the index rose by an average of 1.7 percent. These figures suggest that markets tend to stabilize as political uncertainty decreases.

Magdalena Ocampo, a market strategist at Principal Asset Management, said in an email that volatility around the vote is possible. However, she noted that the historical record points to strong performance in the year after midterms. Ocampo explained that investors can focus more clearly on the economic outlook once electoral ambiguity recedes. This shift in focus has traditionally supported market gains.

Chris Low, chief economist at FHN Financial, emphasized that predictability is key for business growth. In an email sent on Tuesday, Low stated that an environment with less change allows companies to invest in longer-term projects with greater confidence. He added that this stability tends to be positive for corporate earnings. Low described the reduction in legislative risk as a tailwind for sustained economic activity.

Analysts argue that a divided government could prove beneficial for equities. If Democrats secure control of the House, the Senate, or both chambers, the resulting political gridlock could limit Congress's capacity to pass sweeping tax or spending legislation. This limitation reduces the risk of sudden policy changes. Such stability creates a more predictable environment for corporate planning.

Ed Yardeni, president of Yardeni Research, warned that fiscal dynamics could unnerve the bond market. He noted in a note to investors that a lack of stock market volatility does not guarantee an easy path for investors. Yardeni said that prolonged shutdowns and fiscal standoffs could push Treasury yields higher. Higher yields typically weigh on equity valuations by increasing the cost of borrowing.

The Bipartisan Policy Center estimates that the United States will reach its debt limit again between late winter and midsummer of 2027. At that time, lawmakers will face the decision of raising the debt ceiling, temporarily suspending it, or risking another government shutdown. Yardeni observed that if President Trump continues to rely on executive authority, Democrats would have limited power to restrain him even if they controlled Congress.

Jaret Seiberg, a financial policy analyst at TD Cowen, pointed out that Democrats could use new power to block Trump-appointed regulators. They could force the president to fill seats on independent agencies, such as the FDIC, SEC, and CFTC, with their own nominees. A Democratic majority in the Senate would also elevate Sen. Elizabeth Warren to head the Senate Banking Committee. UBS analysts noted that lawmakers would still be restricted in their federal actions due to the president's ability to veto legislation.