According to a research report by JPMorgan, the total market cap of the 14 U.S.-listed bitcoin mining stocks hit a record high of $22.8 billion on June 15. The report also noted that miners outperformed bitcoin in the first two weeks of June, with Core Scientific being the best performer and Argo Blockchain being the worst. U.S.-listed miners have increased their share of the global network hashrate for the second month in a row, accounting for almost 23.8% of the total network hashrate. The report also highlighted that mining difficulty has continued to decline since April's reward halving.