Oil heavyweight Exxon Mobil Corp XOM.N gained 0.7% ahead of its first major boardroom contest where climate change is a central issue. Fears of rising inflation have weighed on Wall Street's main indexes this month, with most analysts expecting a jump in borrowing costs in the short term as the economy reopens. Cryptocurrency-related stocks including those in Riot Blockchain RIOT.O, Marathon Patent Group MARA.O and Coinbase Global COIN.O rose between 2% and 4.6% in premarket trading as bitcoin climbed back above $40,000 for the first time this week.