NEW YORK ( TheStreet) -- CHANGE IN RATINGS Alexander & Baldwin ( ALEX) downgraded at Wells from Market Perform to Underperform, Wells Fargo said. Valuation call, as the stock is up more than 30% over the past week. TD Ameritrade ( AMTD) downgraded at Goldman from Neutral to Sell, Goldman Sachs said. $15 price target. Retail trading remains soft and consensus expectations could prove optimistic. Cabot Oil & Gas ( COG) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. Company should benefit from higher natural gas prices down the road. Cornerstone Therapeutics ( CRTX) downgraded to sell at TheStreet Ratings. Dollar Tree ( DLTR) downgraded at Morgan Stanley from Equal-weight to Underweight, Morgan Stanley said. Valuation call, based on a $45 price target. DSW ( DSW) rated new Hold at Canaccord. $62 price target. Company faces near-term earnings risks. Equinix ( EQIX) rated new Buy at Deutsche. $225 price target. Company should benefit from more outsourcing for data centers. Garmin ( GRMN) downgraded to hold at TheStreet Ratings. Lincare Holdings ( LNCR) downgraded at Jefferies to Hold from Buy, Jefferies said. $41.50 price target. Competing bids to Linde's $41.50 offer unlikely. Lam Research ( LRCX) downgraded at CLSA from Buy to Outperform, Credit Agricole said. $44 price target. Company could face higher costs and lower NAND spending. MasterCard ( MA) downgraded at UBS to Sell from Neutral, UBS said. $403 price target. Slowing growth and unfavorable risk/reward. Northern Trust ( NTRS) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. $53 price target. Estimates also boosted, as the company has stable revenue and can expand margins. NY Community Bancorp ( NYB) downgraded at Credit Suisse from Outperform to Neutral, Credit Suisse said. $14 price target. Estimates also cut, given lower expected margins and increased competition. Boston Beer ( SAM) downgraded at UBS to Sell from Neutral, UBS said. $103 price target. Topline trends may slow. Sirona Dental ( SIRO) upgraded at Baird from Neutral to Outperform, Robert Baird said. $53 price target. Company faces tough sales comps and is leveraged to Europe. State Street ( STT) downgraded at Goldman to Neutral, Goldman Sachs said. Estimates also cut, given lower sales expectations. SolarWinds ( SWI) downgraded at FBR from Outperform to Market Perform, FBR Capital Markets said. $47 price target. Valuation call, as the stock is up more than 50% year-to-date.