Wall Street saw broad gains on Wednesday, as uncertainty about the outcome of the 2018 US congressional elections cleared.
Republicans expanded their majority in the Senate, while Democrats gained control of the House of Representatives.
The divided outcome, which dims chances of major new laws, offered a boon to investors wary of uncertainty.
The Dow and S&P 500 jumped 2.1%, while the Nasdaq climbed 2.6%.
Health care and technology companies led the gains, which occurred across most industries.
On the S&P 500, shares in dialysis company DaVita jumped more than 10%, after California voters turned back a measure that would have limited fees for dialysis treatment.
Shares in marijuana firms also climbed, boosted by measures that expanded legalisation in several states as well as the firing of Attorney General Jeff Sessions, who had taken a hard line against the drug.