Bitcoin Mining Difficulty Plunges 11% — Biggest Drop Since China Ban, Driven by Hashrate Loss and Weather
Bitcoin’s network difficulty dropped 11.16% to 125.86 trillion at block 935,424 after average block times rose to ~11.4 minutes. The cut — the largest negative adjustment since China’s 2021 mining ban and among the top ten in history — followed about a 20% decline in global hashrate over the past month, with much of the loss concentrated in the last week. Contributing factors include sustained BTC price weakness (down ~45% from October highs to near $69k), large U.S. spot-ETF outflows, operational shutdowns, and U.S. winter storms that temporarily removed as much as ~40% of global hashrate by overloading regional grids and forcing pools and farms to curtail operations. Daily revenue per PH (hash price) hit record lows; only the newest ASICs remain broadly profitable while older rigs run at a loss and miner production costs exceed market price, increasing sell pressure. The difficulty reduction eases short-term competition — improving reward rate per unit of hash if BTC price holds — but meaningful miner relief and sustained network recovery depend on price rising closer to production costs. For traders: monitor BTC price vs. miner breakevens, hashrate and difficulty trends, miner inventory and ASIC lifecycle, ETF flows, and grid/regional outage risks. Short-term, the difficulty drop can amplify upside if price rebounds; however, persistent price weakness and miner capitulation could add downward pressure.
Bearish
The difficulty drop is supportive for remaining miners by increasing reward probability per unit of hash, but the context points to bearish price pressure. Key negatives: BTC has fallen ~45% from its October peak, miner breakevens are above market price, daily hash-price is at record lows, and old ASICs operate at a loss. These factors increase miner sell pressure and potential capitulation. Significant recent hashrate loss — partly due to extreme weather and regional grid strain — forced the difficulty cut, but such external shocks also highlight operational fragility. ETF outflows and macro headwinds (higher yields) further depress demand. Short-term price may see relief or a squeeze if difficulty easing combines with buying; historically, large hashrate contractions can precede sizable rebounds, but that depends on renewed buying. Absent a sustained BTC price recovery toward miner production costs, expect continued downward pressure from miner selling and weak demand. Overall, the immediate balance of risks favors further downside for BTC until miner margins improve or macro/ETF flows reverse.