Nvidia shares fell after reports that Meta may start using Google's tensor processing units (TPUs) in its data centers beginning in 2027, which could also lead to Meta renting TPUs from Google's cloud unit as early as next year.Alphabet shares rose while Nvidia dropped about 3.5-3.6% and Wall Street futures declined, showing increased competition in AI chips as Meta seeks more suppliers beyond Nvidia and considers $70 billion to $72 billion in AI infrastructure spending this year.