Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Yelp (YELP) downgraded to Sell at UBS by analyst Eric Sheridan, who said the company will enter a period of slowing revenue growth and margin pressures, driven by increased competition and share gains by larger digital ad companies. 2. Diana Shipping (DSX) downgraded to Sell at Deutsche Bank with analyst Amit Mehrota citing the company's negative cash flows and the "significant" step down in dry bulk rates and its period chartering strategy. 3. Frontier Communications (FTR) downgraded to Underweight at Stephens by analyst Michael Rollins, who cited risk to consensus estimates and his expectations for a dividend cut. 4. Groupon (GRPN) downgraded to Sell at UBS with analyst Eric Sheridan saying the business pressure the company is seeing is unlikely to ease over the medium term. 5. Hornbeck Offshore (HOS) downgraded to Underweight at Stephens by analyst Matthew Marietta, who said shares present a better entry point in the low-to-mid single digit range considering the company's lack of MPSV visibility coupled with its leverage. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

Jefferies raised the firm's price target on Yelp to $43 from $42 and keeps a Hold rating on the shares. In a preview note for the U.S. Internet group, the firm says it will be looking for signs of sustainability in elevated ARPU growth at Yelp, especially as locations/app MAUs remain in decline.