Share prices in New York rallied on Monday, bringing major US indexes to record highs.
Buy orders were placed on a broad range of issues when the New York Stock Exchange opened after the Christmas holidays.
Investors grew optimistic about the US economic outlook after President Donald Trump signed into law a new coronavirus economic aid package that includes relief payments to the public.
The Dow Jones Industrial Average ended at a record 30,403, up 204 points from Thursday.
The tech-heavy Nasdaq and the broader S&P500 also hit record highs.