What it is
A lame-duck session occurs in the period between a general election and the inauguration of new officials, typically from November to early January in the U.S. Congress. During this time, some members of Congress may have lost their re-election bids or chosen not to run again, making them "lame ducks." Despite their impending departure, these members still hold voting power and can pass legislation, confirm appointments, or override presidential vetoes.
Lame-duck sessions can be periods of intense legislative activity, as outgoing members and administrations may push through last-minute policy initiatives or appointments. This can lead to unexpected policy shifts or approvals that impact markets, such as funding for specific programs or regulatory changes. Investors monitor lame-duck sessions for potential "midnight legislation" that could affect various sectors, from defense spending to environmental regulations, or for confirmations of key economic officials.
Why it matters
Lame-duck sessions can bring unexpected policy changes or appointments that affect markets, requiring investors to monitor for last-minute legislative action.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice