Today’s daily gainers are MGIC Investment Corp. (NYSE:MTG), Novacopper Inc (NYSEMKT:NCQ), Radian Group Inc (NYSE:RDN) and daily losers are Supertex, Inc. (NASDAQ:SUPX), Gulfport Energy Corporation (NASDAQ:GPOR), Randgold Resources Ltd. (NASDAQ:GOLD).

MGIC

MGIC Investment is today’s top performing stock

Today’s top-gaining stock is MGIC Investment Corp. (NYSE:MTG), a firm that provides mortgage insurance to lenders and government-sponsored entities in the United States. The stock shot up +14.46% today to $8.31 following the announcement of $12.1 million in net income last quarter. John Paulson got a boost off of this one. He holds 16.5 million MTG shares, representing 0.71% of his portfolio. In fact, the billionaire has gained +104.66% in this position overall, having paid an average price of $4.08 per share.

Following MGIC is exploration-stage company NovaCopper Inc (NYSEMKT:NCQ), which is up +8.23% and trading at $1.71. Many of our billionaires have NCQ stakes, including Seth Klarman, who holds more than five million shares (0.22% of his holdings) bought at an average price of $3.24. And John Paulson holds 5.9 million shares, representing 0.07% of his portfolio. Paulson paid an even higher average price than Klarman for NCQ: $3.33.

The last firm on our list of daily gainers is Radian Group Inc (NYSE:RDN), another mortgage insurance firm, which today saw an increase of +6.70% ($14.35). This is yet another hit for John Paulson, who owns 11.3 million shares, bought at $4.83 and representing 0.93% of his fund.

Daily Losers

On top of our daily losers list is Supertex, Inc. (NASDAQ:SUPX), a company that offers high voltage analog multiplexer switches. Today, its stock price declined -4.01% to hit $24.18. Billionaire George Soros is the only investor tracked by iBillionaire with a position in SUPX. Soros holds 167,000 shares, which represent 0.04% of his holdings.

The second firm with a significant loss today is Gulfport Energy Corporation (NASDAQ:GPOR), which dipped -3.36% to $65.66. Billionaire Richard Chilton holds 379,000 GPOR shares (as of June), representing 0.48% of his fund. This position cost Chilton an average price of $41.38 per share. Another billionaire affected by this one is George Soros, who holds 486,000 shares, representing 0.25% of his holdings and bought at $36.95 each.

The last firm in the daily loser list is gold company Randgold Resources Ltd. (NASDAQ:GOLD), which is down -3.99% and now trading at $69.62. With 671,000 shares, GOLD represents 0.30% of the John Paulson’s portfolio. The billionaire paid $80.23 per share, meaning a -13.13% loss in this position.