Cipher Mining’s Wild Ride: Google AI Deal Propels CIFR Stock Up, Then Down – What’s Next for the Bitcoin Miner?
Cipher Mining’s stock has been on a rollercoaster in late September 2025. After steadily climbing through mid-month – even notching a 52-week high amid a crypto-miner rally theminermag.com – CIFR saw explosive volatility on September 25 when major news hit. In early trading that day, the share price surged as much as 20% on enthusiasm over the company’s new AI hosting venture backed by Google coindesk.com. The euphoria was short-lived: by midday, profit-taking and concerns about a concurrent financing reversed those gains, and CIFR actually fell into the red, closing around $11.66 ainvest.com. Such a drastic intraday swing – from double-digit % gain to loss – underscores the market’s uncertainty about how to value Cipher’s new direction.