JP Morgan Chase released the latest research report, based on the performance of the third quarter and the rise in bitcoin prices and computing power, and upgraded the ratings of several bitcoin mining companies. Among them, Cipher Mining and CleanSpark were upgraded from "neutral" to "overweight", with target prices of $8 and $17 respectively; MARA Holdings was upgraded from "underweight" to "neutral", with target prices raised from $12 to $23. Affected by this, Cipher rose more than 4% before the market, CleanSpark rose 3.5%, and MARA rose more than 2%. At the same time, the bank downgraded the IREN rating to "neutral", but raised the target price to $15, and maintained its "overweight" rating on Riot Platforms, raising the target price to $16.