Shares of Boston Scientific Corp. tumbled 6.4%, and Stryker Corp.'s stock shot up 6.4%, after Stryker said it was not in talks to buy Boston Scientific, dispelling speculation after The Wall Street Journal reported on Monday that Boston Scientific had been approached by Stryker. In a filing with the Securities and Exchange Commission, Stryker said in a statement: "While it is Stryker Corporation's (Stryker) longstanding practice not to comment on these matters, today Stryker issued the following statement in response to the market speculation about a proposal to acquire Boston Scientific Corporation: 'Stryker is not in discussions with Boston Scientific Corporation regarding a potential acquisition.'" The medical technology products company's stock had plunged 9.2% in two days since the WSJ report, while Boston Scientific shares had rallied 5.9% and the S&P 500 had inched up 0.3%.