Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. BHP Group (BHP) upgraded to Buy from Neutral at Goldman Sachs. 2. Marten Transport (MRTN) and Heartland Express (HTLD) upgraded to Overweight from Sector Weight at KeyBanc. 3. MercadoLibre (MELI) upgraded to Buy from Neutral at BTIG with analyst Marvin Fong saying the pullback in shares post-Argentina is overdone. 4. Schlumberger (SLB) upgraded to Overweight from Equal Weight at Morgan Stanley with analyst Connor Lynagh saying that while the stock struggled over the past several years, its relative outlook is improving. 5. Boston Properties (BXP) upgraded to Equal Weight from Underweight at Morgan Stanley with analyst Vikram Malhotra saying valuations are more reasonable today in the New York City office real estate investment trust space following this year's underperformance. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

BHP Group (BHP) is weighing a possible acquisition of Anglo American (NGLOY), Bloomberg's Crystal Tse, Dinesh Nair, and Thomas Biesheuvel report, citing people with knowledge of the matter. The company has recently been evaluating the possibility of an offer for Anglo American, the authors note. Reference Link

Jefferies lowered the firm's price target on MercadoLibre to $1,400 from $1,650 and keeps a Hold rating on the shares. A recent ramp in investments could pressure EBIT near-term, though continued momentum in GMV, Advertising, and Credit "would keep the long-term story alive," the analyst tells investors in a preview note for the U.S. Internet group.

DZ Bank upgraded MercadoLibre to Buy from Hold with a $1,685 price target.