Catch up on today's top analyst upgrades with this list compiled by The Fly: 1. Vipshop (VIPS) was upgraded to Buy from Neutral at BofA/Merrill. 2. Chesapeake (CHK) was upgraded to Equalweight from Underweight and Forum Energy (FET) was upgraded to Overweight from Equalweight at Capital One. 3. Noble Corp. (NE) and Patterson-UTI (PTEN) were upgraded to Neutral from Underperform while Marathon Oil (MRO) and Sasol (SSL) were upgraded to Buy from Neutral at BofA/Merrill. 4. Shenandoah (SHEN) was upgraded to Outperform from Market Perform at Raymond James with analyst Ric Prentiss citing valuation, increased visibility into the future of the combined nTelos (NTLS) and Sprint (S) entity, and expectations of further transactions with Sprint that would expand its wireless coverage footprint and serve as a further catalysts for shares. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.