Bitfarms and Cipher Mining emerged as standout performers in September’s Bitcoin mining stock surge, with both companies posting remarkable gains as the sector outpaced Bitcoin itself by significant margins. Bitcoin mining stocks experienced exceptional momentum throughout September 2025, with major players posting gains between 44% and 138% while Bitcoin declined more than 3% during the same period. Bitfarms (NASDAQ: BITF) and Cipher Mining (NASDAQ: CIFR) led this rally, showing strong investor appetite f ...