Analysts at Deutsche Bank initiated coverage on Advanced Drainage Systems (NYSE:

) with a Buy rating. The target price for Advanced Drainage Systems is set to $24. Advanced Drainage Systems' shares closed at $19.01 yesterday. Jefferies initiated coverage on shares of Star Bulk Carriers (NASDAQ:

) with a Buy rating. The target price for Star Bulk Carriers is set to $21. Star Bulk's shares closed at $13.95 yesterday. Analysts at Imperial Capital initiated coverage on shares of Ambarella (NASDAQ:

) with a Outperform rating. The target price for Ambarella is set to $39. Ambarella's shares closed at $35.25 yesterday. Analysts at Tudor Pickering initiated coverage on Viper Energy Partners LP (NASDAQ:

) with a Accumulate rating. Viper Energy Partners' shares closed at $31.83 yesterday.