Alnylam: Piper Sandler downgrades to neutral from overweight. PT up 1.2% to $181

Chatham Lodging: B Riley Securities upgrades to buy from neutral. PT up 31% to $15

Chevron: DZ Bank AG cut the recommendation to hold from buy. PT up to 7.2% to $110

Clorox: Atlantic Equities cut the recommendation to neutral from overweight. PT down 8.6% to $150

Global Payments : MoffettNathanson adjusts pt to $210 from $230, maintains neutral rating

Mercury Systems: Cut to Neutral at Baird. PT lowered by 12% to $56

Nikola : BTIG lowers price target to $16 from $18, reiterates buy rating

Pinnacle West Capital: KeyBanc Capital Markets downgrades to underweight from sector weight. PT set to $72 - an 11% decrease from last price. 

Rambus : Jefferies & Co adjusts pt to $23 from $20, maintains hold rating

Rio Tinto: Barclays maintained his recommendation on the stock with a Neutral rating. The target price is set at GBp 6000 versus GBp 6150.

Ultragenyx Pharmaceutical : JPMorgan adjusts pt to $132 from $147, maintains neutral rating