Bitcoin miners face tighter margins as difficulty climbs 3.12%, hashprice falls and BTC trades below $77K.

Bitcoin mining stocks dropped up to 9.59% on May 15, 2026, yet every major miner still outpaces BTC's negative 11.1% year-to-date return.

Bitcoin miners face tighter margins as difficulty climbs 3.12%, hashprice falls and BTC trades below $77K.