text:  Musk is fighting against a security frauds lawsuit alleging the billionaire waited 11 days to reveal a stake in Twitter back in 2022. Former Twitter shareholders say that delay saved Musk around $143 million and cost investors serious money. Under securities law, Musk was supposed to alert regulators within 10 days after purchasing 5% or more of Twitter stock. Musk now says his failure to do so was a mistake and not a scheme to defraud. Lawyers for Musk say he misunderstood a federal disclosure law.