Regulators are once again scrutinizing Elon Musk, this time over his acquisition of Twitter. The SEC is reportedly investigating Musk for potentially breaking disclosure rules related to his purchase of Twitter stock. Specifically, the investigation focuses on whether Musk failed to disclose his ownership of more than 5% of Twitter's shares in a timely manner. This follows previous accusations of fraud against Musk over a buyout that did not materialize. The late disclosure of Twitter stock purchases is reportedly on the radar of the SEC, according to SA. The outcome of this investigation could have implications for Tesla as well.