Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Discovery (DISCA) upgraded to Buy from Neutral at MKM Partners with analyst Eric Handler citing attractive growth opportunities, a deleveraging balance sheet and a low valuation that make for an "appealing" risk/reward. 2. Occidental Petroleum (OXY) upgraded to Buy from Neutral at Citi with analyst Robert Morris citing the midstream benefit of wider midland-MEH differentials for his upgrade. 3. Noble Corp. (NE) upgraded to Market Perform from Underperform at Bernstein with analyst Colin Davies citing its strong exposure to the high specification jack up sector where the market has found a floor and there is some tentative evidence of rate improvement. 4. Paccar (PCAR) upgraded to Outperform from Neutral at Macquarie with analyst Sameer Rathod saying his proprietary used truck value analysis indicates Paccar branded trucks continue to increase in value, and highlights that low-age Paccar trucks continue to recover faster than older models, indicating a shortage of new trucks. 5. Gerdau (GGB) upgraded to Overweight from Equal Weight at Morgan Stanley with analyst Carlos De Alba saying he thinks the 25% tariffs on EU steel is positive for Gerdau's U.S. realized prices. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.