Alibaba has applied to sell stock to the public in what could be the biggest American IPO since Facebook's in 2012.
Investors thinking they were onto a sure thing with cheap Twitter shares were actually buying up parts of a bankrupt company.
Twitter may be preparing to go public next year, with one research firm placing a giant valuation on the company.
Pandora's stock continues to fall as rumors about Apple launching its own internet streaming radio service build.
RR Donnelley filed Google's quarterly financial results ahead of schedule and without authorization, revealing missed expectations.