Walmart struggling U.K. subsidiary could be blocked from merging with a larger rival over concerns from the country's competition watchdog that the tie-up would lead to higher prices and a "poorer experience" for shoppers in Europe's second-largest market.

The market is breathing a little easier after Apple's better-than-expected quarter. But it still must contend with a terrible quarter from Snap and what could be a disaster from Tesla on Wednesday evening.

Stocks finished lower as Wall Street processes a mega-merger between Sprint and T-Mobile US and as Walmart says it will sell its supermarket business in the U.K.

Global stocks kicked-off the week in a bullish mood Monday, with merger activity and a robust U.S. corporate earnings season helping boost markets in Europe and Asia and set up Wall Street for a positive start to the final trading day of the month.

Tesla said it had a record rate of production in June, but supply chain disruption and the closure of its Shanghai gigafactory triggered a slump in Q2 deliveries.

GDP shrank an annualized 1.6% in the first quarter, and some experts anticipate another drop in the second quarter.

The platform denies selling proprietary customer data and announces it is expanding into several European countries.