Intraday Gainers

MAKO Surgical MAKO +22.61% after Piper Jaffray reiterates its Overweight rating and raises PT to $36. Northern Oil & Gas NOG +21.43% on heavy volume. Scientific Games SGMS +16.17% on upbeat earning reported this morning. Live Nation Entertainment LYV +11.05% after Goldman Sachs and Stifel Nicolaus reiterated their ratings on the company. NXP Semiconductors NXPI +10.83% on heavy volume. Huntsman Corporation HUN +9.72; it was announced yesterday that the company's CEO bought 100K shares. AMR Corporation AMR +10.51% on heavy volume.