Shares of Marathon Digital Holdings (MARA), CleanSpark Inc. (CLSK), and Iris Energy (IREN) experienced declines as of December 15, with MARA and CLSK both dipping to $17, and IREN falling to approximately $8 from $17.3 the previous day. The global hash rate remains under 1000 EH, recorded at 987 EH, indicating ongoing challenges in the mining sector. From December 1 to December 15, Marathon Digital led in self-mining output with 309.56, followed by CleanSpark at 296.34, and Iris Energy at 244.86. These figures reflect the competitive landscape among self-mining companies as they navigate fluctuating market conditions and operational hurdles.