Large foreign investors would have access to confidential information about Twitter’s finances — and potentially its users — under the terms of Elon Musk’s deal to acquire the social media site, people familiar with the matter told The Washington Post. That revelation comes as Treasury Department officials begin looking into whether they have the legal authority to start an investigation into the purchase because of Musk’s ties to foreign governments and investors, people familiar with those discussions said. It was not immediately clear whether Treasury officials were aware of the terms granting information rights to large investors. The exploration of whether a review was warranted is fairly routine, and such preliminary examinations often do not end in a full investigation.