Judge Lawrence M. McKenna of the SDNY dismissed the securities class action against UBS, which alleged that the bank misled investors when it sold them auction rate securities. The court ruled that the case could not continue because UBS had already reached a $19.4 billion settlement in the matter in August with the SEC and several state regulators in which UBS agreed to buy back nearly that amount of securities and pay a fine, the NYT reports. From Securities Docket.