Elon Musk Sparks, Investing Frenzy in a Company He Didn't Endorse

An obscure medical device company's stock price surged more than four hundred per cent after elon musk endorsed a messaging apwith the same name. As the confusion was cleared up, the bazaar rally started. After the billionaire tesle chief told his forty two million twitter followers to use signal on th Thursday, apparently referring to the mobile ap that lets uses exchange in crypted messages. But investors instead bought up shares of signal advance incorporated,. A small texas based fit that makes devices used to detect various health problems. The company's stock traded over the counter under the ticka simble. Despite news reports about a the apparent ticker confusion, the stock plummeteda as much as sixty...