Wall Street's main indexes jumped on Thursday, as investors welcomed a handful of positive corporate earnings and signs that the U.S. was open to de-escalating its trade war with China. Software firm ServiceNow and toymaker Hasbro topped the S&P 500,

The recent optimism on Wall Street dissipated early Thursday as companies continued to reassess their financial outlooks due to uncertainty over U.S. President Donald Trump's on-again-off-again tariff policies.

The S&P 500 climbed 1.7%. The Dow Jones Industrial Average rose 419 points, or 1.1%, and the Nasdaq composite gained 2.5%.