NEW YORK ( TheStreet) -- CHANGE IN RATINGSIntercontinental Exchange ( ICE) upgraded at BMO to Outperform. $125 price target. Valuation call, as the company still has meaningful growth potential. Idex ( IEX) upgraded at Brean Murray to Buy. $38 price target. Company posted a very strong quarter. LG Display Company ( LPL) downgraded at BofA/Merrill to Underperform from Buy on weaker industry fundamentals over the next 1-2 quarters. Mantech ( MANT) downgraded at Wells from Outperform to Market Perform. COO resigned surprisingly, which adds risk to the thesis. Mercadolibre ( MELI) rated new Hold at ThinkEquity. MELI was initiated with a Hold rating. Valuation call, as the stock is already trading at 39 times expected 2011 earnings. PNC Financial ( PNC) rated new Outperform at BMO PNC was initiated with an Outperform rating. $73 price target. Company should return to full earnings power sooner than most of its peers. PPG Industries ( PPG) upgraded at Morgan Stanley from Equal-weight to Overweight. $77 price target. Estimates also boosted, as the company has the best end-market and geographic exposure in the industry. Ritchie Bros. ( RBA) downgraded at Oppenheimer to Perform. Company is facing challenges in construction end-markets. RLI ( RLI) upgraded at Stifel from Sell to Hold. Company deserves to trade at a premium valuation. Schnitzer Steel ( SCHN) upgraded at UBS from Neutral to Buy. $56 price target. Scrap prices should improve in August. Sherwin-Williams ( SHW) downgraded at BofA/Merrill to Neutral from Buy. Risks rising on weaker demand. Price target cut to $80 from $87. Sherwin-Williams ( SHW) downgraded at Morgan Stanley SHW was downgraded from Equal-weight to Underweight, Morgan Stanley said. $78 price target. Company has held up better than its peers, but fundamentals appear to be deteriorating. Questar ( STR) upgraded at JP Morgan. Rating raised to Neutral from Underweight. Maintains $16 price target and 2010 EPS estimates of $1.06. Wolverine World Wide ( WWW) upgraded at Argus from Hold to Buy. $30 price target. Valuation call, as the company should continue to deliver in a volatile environment.