The peso opened at about 18.64 per dollar, up 1.03%, after Democrats won control of both chambers of Congress. The dollar fell 0.57% on its trade-weighted index and had its largest drop since August 19.
Democrats gained five governorships, and the House count was still being finalized.
A less polarized US Congress lowers the risk of abrupt trade policy shifts, which supports the peso and weakens the dollar. Those currency moves affect the cost of imported feed for Mexican buyers rather than commodity prices directly.
Not enough comparable past events yet for a historical read.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.