Today’s midday gainers are International Tower Hill Mines Ltd (NYSEMKT:THM), SouFun Holdings Ltd (NYSE:SFUN) and FireEye Inc (NASDAQ:FEYE). The losers are Zulily Inc (NASDAQ:ZU), Navistar International Corp (NYSE:NAV) and Veeva Systems Inc (NYSE:VEEV).

Tiger Global

International Tower Hill Mines Continues to Rally

The top midday gainer this Wednesday is International Tower Hill Mines Ltd (NYSEMKT:THM), up +14.30%. The John Paulson pick has had a solid week overall, fueled by a surge in the price of gold. The stock is up +114.63% YTD.

Chinese online real estate portal SouFun Holdings Ltd (NYSE:SFUN) started the day off strong as well, its stock price having increased +12.65% after exceeding analysts’ estimates for Q4 earnings. Shares of this mid-cap company are now up +14.8% YTD – great news for Steve Mandel, Richard Chilton and Tiger Global.

Rounding out today’s list is FireEye Inc (NASDAQ:FEYE), with a surge of +8.20%. Another Tiger Global pick, the cybersecurity firm jumped following news that a competitor had posted record-breaking earnings. In other words, the cybersecurity business is booming.

Zulily in the Red After Good Run

Down -6.98% is online retailer Zulily Inc (NASDAQ:ZU), today’s biggest loser at midday. The company’s stock has had a good run in recent weeks, meaning this price dip likely comes as a result of short-term investors choosing to cash in. ZU, a Tiger Global bet, is up +49.41% YTD.

Navistar International Corp (NYSE:NAV) slipped -3.97%. The manufacturer of military trucks, buses and engines released its earnings today, and apparently the market wasn’t pleased with its delivery. Both Tiger Global and Carl Icahn have positions in Navisatr.

Last up is another Tiger Global holding,  Veeva Systems Inc (NYSE:VEEV), which declined -3.90%. A cloud-based software solutions provider for the life sciences industry, the company reported results and guidance today.