With the advancements in biotechnology generating some attractive investment opportunities, exchange traded fund investors may now focus on a group of companies that specialize in the growing field of cancer immunotheraphy.

The Loncar Cancer Immunotheraphy ETF (NasdaqGM: CNCR) began trading Wednesday, October 14, according to a press release. CNCR has a 0.79% expense ratio.

“Immunotherapy is changing the way many cancers are being treated,” Brad Loncar, Chief Executive Officer of Loncar Investments, said in the press release. “This innovative field within biotechnology is expected to become the foundational treatment for cancer over the next ten years. We think it is important to give investors a benchmark to track the progress of this growing biotechnology sector, which over time will likely continue to have a positive impact on society.”

CNCR tries to reflect the performance of the Loncar Cancer Immunotherapy Index, which was developed by biotechnology investor Brad Loncar. The underlying index tracks large pharmaceutical and growth-oriented biotechnology companies in the cancer treatment space. Specifically, the index tracks companies that are developing new classes of therapies, like checkpoint inhibitors, next generation vaccines and chimeric antigen receptor (CAR) technologies.

“Biotech stocks tend to get grouped together as a whole, yet areas like immunotherapy trade on their own unique circumstances and innovations,” according to Loncar Investments. “While traditional medicines like chemotherapies often give cancer a broad punch, the benefit of using immunotherapy is derived from the immune system’s dynamic nature and the way it can more precisely be tailored to fight a patient’s disease.”

The underlying index first selects seven top large pharmaceutical companies working on immunotherapy for their strategic focus on cancer treatment and their leadership role in the field. Additionally, the index picks the top 23 growth biotechnology companies in immunotherapy by market capitalization. The cancer index is then equally weighted.