A top exchange-traded fund provider is betting on the long-term popularity of GLP-1 weight loss drugs. Roundhill Investments' GLP-1 & Weight Loss ETF (OZEM), which began trading last week, pairs leaders Eli Lilly and Novo Nordisk with players developing new treatments for weight loss and diabetes. Eli Lilly and Novo Nordisk each hold a roughly 20% weighting in the ETF, per Roundhill's website as of Friday. Mazza waived concerns that investors have missed out on the rally, noting the weight loss drug industry is still in its "early days." After last Tuesday's launch, shares of Roundhill's GLP-1 & Weight Loss ETF ended the week down by almost 2%.

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Persons: Eli Lilly, Dave Mazza, Mazza, CNBC's Organizations: Investments, Novo Nordisk, Zealand Pharma, Amgen, Chugai Pharmaceutical Locations: Roundhill's