Of the 28 companies in the index, 21 firms saw their stock prices increase throughout the first half of the year, while seven firms' share prices decreased.
Issued last week, the guidance said insurers were not required to reimburse such testing, which could impact coverage in schools, workplaces, and other settings.
The company said it will look to obtain regulatory approval in additional countries to accelerate the analyzer's market introduction in Asia and Africa.
