Broad S&P 500 increased 0.1 percent, while Dow Jones industrial index fell 0.1 percent. Nasdaq's composite index rose 0.1 percent.
A somewhat hesitant market, awaiting Wednesday's interest rate decision from the American Federal Reserve.
Electric car manufacturer Tesla recovered somewhat after last week's fall, and increased 5.6 percent.
On Monday, restaurant chain McDonald's released its report for the second quarter. Despite the company missing analysts' expectations, according to CNBC, the stock became one of the day's big winners. At closing, it had risen approximately 3.7 percent.
Hard drive manufacturer Western Digital, on the other hand, became one of Monday's big losers and fell 2.7 percent.
This week, reports are expected from several tech giants, including Microsoft and Apple.
