NEW YORK ( TheStreet) -- MannKind Corporation (Nasdaq: MNKD) hit a new 52-week low Friday as it traded at $4.39 compared with its previous 52-Week low of $4.60. MannKind is changing hands at $4.44 with 1.2 million shares traded as of 9:32 a.m. ET. Average volume has been 4.1 million shares over the past 30 days. MannKind has a market cap of $641.3 million and is part of the health care sector and drugs industry. Shares are down 37.2% year to date as of the close of trading on Thursday. MannKind Corporation, a biopharmaceutical company, focuses on the discovery, development, and commercialization of therapeutic products for diabetes and cancer. TheStreet Ratings rates MannKind as sell. The company's weaknesses can be seen in multiple areas, such as its generally disappointing historical performance in the stock itself and poor profit margins. You can view the full MannKind Ratings Report.