Midday Movers; Frontline up 15%

Frontline FRO +15.20% on heavy volume. QuinStreet QNST +8.56% on heavy volume. Monster Worldwide MWW +7.97% after the insider disclosed purchasing shares in the company. JDS Uniphase Corporation JDSU +5.95% - hearing RBC Capital Markets raised the company's PT to $18. SINA Corporation SINA +5.83% after the reports that the company acquires a $66.4 million stake in Tudou. Molycorp MCP +5.80% -hearing chatter about M&A speculation. Zillow Z +5.42% after the company's CEO appeared on CNBC. Aspen Technology AZPN -6.07% on heavy volume. Global Industries GLBL -5.08% on heavy volume.