LONDON, June 9 (Reuters) - Top U.S. and Chinese officials will sit down in London on Monday for talks aimed at defusing the high-stakes trade dispute between the two superpowers that has widened in recent weeks beyond tit-for-tat tariffs to export controls over goods and components critical to global supply chains.

US stocks flipped between small gains and losses early on Monday as investors awaited the outcome of crucial trade talks between Washington and Beijing in London.

Delegates from the United States and China are set to meet Monday in London after a phone call between the nations' leaders seemingly led to a cooling of tensions related to their otherwise heated recent trade dispute.