Sierra is the national enquirer of stock analyst publications... all sizzle, no steak... for entertainment purposes only... they throw out so many predictions that occasionally they hit one... they frequently tell investors what they want to hear... so investors like to think there is something to it...
Could Roche make a deal with Cellceutix... of course they could... but it is no more likely after Sierra provides "inside info" than it was before they did so... no less likely either...