• Daily mining revenue and gross profit fell in October for the fourth month in a row, the report said.

• The bank noted that daily block reward gross profit fell to the lowest point on recent record.

• Mining difficulty hit an all-time high in October, the bank said.

Daily bitcoin {{BTC}} mining revenue and gross profit dropped in October for a fourth straight month, JPMorgan (JPM) said in a research report Friday.

The bank estimated that bitcoin miners earned an average of $41,800 per exahash per second (EH/s) of hashrate in daily block reward revenue, 1% less than in September. Hashrate refers to the total combined computational power used to mine and process transactions on a proof-of-work blockchain and is a proxy for competition in the industry and mining difficulty.

Profitability also fell. The bank estimated that daily block reward gross profit dropped 2% in October to the lowest level "on recent record."

On a positive note, transactions fees spiked to as high as 60% of the block reward toward the end of the month, providing some hashprice relief, the bank said. The hashprice is a measure of mining company daily revenue.

The monthly average hashrate for the Bitcoin network surged to a record high of 702 EH/s in October, after a whopping 9% gain from the month previous, the report noted.

"The month-end seven-day moving average network hashrate stood higher at 748 EH/s, up 18% from the end of September and up 62% year-on-year," analysts Reginald Smith and Charles Pearce wrote.

The total market cap of the 14 publicly listed miners that the bank tracks rose 14% to $23.9 billion, led by companies with high-performance computing (HPC) exposure.

Read more: U.S.-Listed Bitcoin Miners Hit Record 29% of Network Hashrate in October: JPMorgan