These 5 Stocks Have More Than Doubled In 2015

The stock market has continued its six-year march higher so far in 2015, as the S&P 500 climbed about 0.4 percent to new all-time highs in the first quarter. However, investors in these five names have seen their holdings more than double year-to-date.

1. Nymox Pharmaceutical Corporation NYMX

Shares of Nymox recently spiked on news that the company would continue to analyze Phase 3 data on NX-1207 as a treatment for prostate enlargement. Although traders that bought in at the beginning of 2015 are now up more than 330 percent year-to-date, the stock fell more than 80 percent in one trading day back in November when it reported that two Phase 3 studies of NX-1207 had failed to produce the desired results.

2. Amarin Corporation plc (ADR) AMRN

Amarin shares recently spiked by more than 25 percent in one day on an upgrade by H.C. Wainwright analysts. Analysts believe that the company's decision to continue operating at a steep loss in order to fund its REDUCE-IT cardiovascular study is a good long-term decision. It has certainly been a good short-term decision for shareholders so far in 2015, as the stock is up more than 140 percent so far this year.

3. Esperion Therapeutics Inc ESPR

Shares of Esperion are up more than 146 percent in 2015 after the company reported positive Phase 2 results on cholesterol drug ETC-1002.

4. Genetic Technologies Limited (ADR) GENE

After the Australian company announced that six additional diagnostic/treatment centers would be offering BREVAGenplus to at-risk patients, shares of Genetic Technologies made a big move and are trading up more than 140 percent year-to-date.

5. Voltari Corp VLTC

The healthcare sector isn't the only sector with big winners so far in 2015. Mobile ad company Voltari has delivered a nearly 300 percent gain for its shareholders this year. The stock received a huge boost when activist investor Carl Icahn recently disclosed his massive 52.3 percent stake in the company.