Why Is Accuray Incorporated ( $ARAY ) Stock Down -15.28% Today? (Find out why any stock moved today on Tickeron.) ARAY shares fell roughly 15.28% in early trading Tuesday, last around $0.254 versus a prior close of $0.2998. The decline follows Monday's roughly 39% surge, which was sparked by a new imaging collaboration with Samsung HME America (Samsung NeuroLogica). Today's move reflects profit-taking and a "buy the rumor, sell the news" unwind after a speculative spike on record volume. $ILMN $A $ICUI $NVST