Bitfarms and Cipher Mining Stocks Surge Amid Bitcoin Decline in September

In September 2025, Bitcoin mining stocks experienced substantial growth, outpacing Bitcoin's performance despite its decline. Key performers included Bitfarms and Cipher Mining.

Bitcoin mining stocks surged between 44% and 138%, while Bitcoin decreased by over 3%.
Bitfarms (NASDAQ: BITF) saw its stock price more than double, reaching a one-year high of $3.20, with trading volumes significantly above average. The company's market cap rose to $1.769 billion, a 94% increase from the previous year-end.
Bitfarms sold a BTC mining site in Paraguay and reported selling 1,052 BTC in August 2025, increasing its liquid assets.
Cipher Mining (NASDAQ: CIFR) advanced approximately 40%, with shares reaching a 52-week high at $12.66. Over six months, it delivered a 313% return.
Cipher Mining's market cap hit $4.66 billion, driven by its dual mining and AI computing strategy.
The sector's growth is supported by diversification into AI and high-performance computing services, amid increasing Bitcoin mining difficulty.
Hive Digital and Iris Energy are also pivoting towards AI infrastructure and high-performance computing.
Despite strong stock performances, Bitcoin mining fundamentals face challenges, including rising network difficulty and declining transaction fees.