Marathon Digital (NASDAQ:MARA) stock falls 11% after the bitcoin miner discloses that it received a subpoena from the Securities and Exchange Commission seeking documents about its Hardin, Montana, data center facility. In October 2020, Marathon Digital (MARA) entered into a number of agreements with multiple parties to design and build the data center for up to 100-MW in Hardin. "We understand that the SEC may be investigating whether or not there may have been any violations of the federal securities law," the company said in its 10-Q. "We are cooperating with the SEC." Earlier on Monday, the Marathon Digital (MARA) said it's offering $500M of convertible senior notes in a private offering.