Yahoo Financeยท2025-09-18 21:14Core Insights - Bitcoin mining stocks experienced exceptional momentum in September 2025, with major players posting gains between 44% and 138%, while Bitcoin itself declined over 3% during the same period [2] Group 1: Bitfarms Performance - Bitfarms stock reached a one-year high of $3.20 on September 18, marking ten consecutive days of gains and more than doubling in value over the past week [3] - The stock gained more than 132% from its monthly opening price of $1.34 to around $3.18, with a market capitalization rising to approximately $1.769 billion, representing a more than 94% increase from the end of 2024 [4] - The company sold a BTC mining site in Paraguay to Hive Digital and reported selling 1,052 BTC in August 2025, indicating a substantial amount of liquid assets [5] Group 2: Cipher Mining Performance - Cipher Mining advanced approximately 40% in September, reaching new 52-week highs at $12.66, with shares delivering an impressive 313% return over the past six months [6] - The stock closed at $11.85 with a market capitalization of $4.66 billion, reflecting strong institutional interest in its dual mining and high-performance computing strategy [7] - Cipher Mining presented an operational update on September 4, announcing the addition of new production capacity and maintaining market expectations for a significant deal by the end of 2025, likely related to Bitcoin mining or a pivot to AI [8]