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The Bitcoin (BTC) price rebound to a multi-month high has rubbed onto the mining stocks as well. Many of these crypto-mining stocks recorded their best monthly performance in a year. The surge in mining stocks also came as a relief for the troubled miners who had to sell a significant chunk of their mined coins to boost liquidity last year.

Bitfarms, one of the top BTC mining firms registered a 140% surge in the first two weeks of January followed by Marathon Digital Holdings Inc. with a 120% surge. Hive Blockchain Technologies Ltd. saw its stock value nearly double in the same period while MVIS Global Digital Assets Mining Index is up by 64% in the first month as well.

The Luxor Hashprice Index, which aims to quantify how much a miner might make from the processing power used by the Bitcoin network, has increased by 21% this year. This partly reflects larger rewards due to an increase in the price of Bitcoin.

The bull run in 2021 prompted several mining companies to go public while others invested heavily in pieces of equipment and expansion. However, a prolonged crypto winter in 2022 exposed the vulnerabilities and lack of proper structuring in many of these mining firms.

Related: Samsung investment arm to launch Bitcoin Futures ETF amid rising crypto interest

The 2021 bull market saw a significant increase in borrowing by the Bitcoin mining industry, which had a negative effect on their financial standing during the succeeding bear market. Public Bitcoin miners owe more than $4 billion in liabilities while the top 10 Bitcoin mining debtors collectively owe nearly $2.6 billion. By the end of 2022, leading BTC miners such as Core Scientific filed for bankruptcy.

Public Bitcoin mining companies with highest debt. Source: Hashrate Index

The BTC price surge in January has not just helped struggling crypto mining stocks to reach new yearly highs, but it also helped Bitcoin-based exchange-traded funds (ETFs) to outperform most of the traditional equity ETF market as well.