Midterm elections don’t replace the president—so why can they affect the US stock market?|US midterm elections and the US stock market ①

What exactly do the midterm elections decide? Will the president be replaced?

No. Midterm elections take place halfway through the president’s four-year term, and the main contest is control of Congress.

Congress consists of the House of Representatives and the Senate.

The House has 435 seats. Representatives serve two-year terms, so all seats are up for election. Seats are allocated by population, with each district electing one representative.

The Senate has 100 seats—two per state. Senators serve six-year terms, and about one-third are up for election every two years.

In addition, some states also elect governors and local officials.

So why does the president care so much?

Because to advance policies, the president often needs Congress’s approval.

For example, lowering corporate taxes requires bills passed by both chambers; many government programs require funding that Congress must approve; and key nominations like cabinet members and federal judges need confirmation by the Senate.

If the president’s party controls both chambers, policies are usually easier to push through. The opposing party only needs to take one chamber to add friction on legislation and appropriations.

But the opposition can’t do whatever it wants either—the president can still veto bills.

So what midterm elections determine is: how much policy the president can advance over the next two years, and how many compromises must be made.

Why does that affect US stocks?

Taxes affect corporate profits, government spending affects industry demand, and regulation influences operating costs.

For investors, beyond who wins, it’s also important to ask: which policies can actually be implemented—and whether stock prices have already priced them in.

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