Investors kickoff the week awaiting more developments on President Trump’s trade deals and the decision on interest rates by the Federal Reserve out Wednesday. Optimism is improving after the S&P 500 notched the longest winning streak in 20 years last week.

Warren Buffett's Berkshire Hathaway on Saturday reported first-quarter operating earnings that dropped 14.1% year-over-year, while its cash pile hit a record high.