 Shares of MercadoLibre NASDAQ: MELI, the online retailer sometimes called the Argentine eBay, are soaring in Monday trading, up 4.7 as of 12:50 p.m. EDT. First, Jefferies this morning raised its price target on MercadoLibre stock from 800 a share to 990. More unqualifiedly good news, though, comes from Brazilian investment banker Banco Bradesco, which this morning upgraded MercadoLibre stock from neutral to outperform -- and gave the stock a 1,250 price target to boot. 