Packages of Beyond Meat plant-based burger patties are displayed for a photograph in Tiskilwa, Illinois, April 23, 2019.

Bernstein downgraded shares of Beyond Meat Wednesday on valuation concerns, joining J.P. Morgan as the latest Wall Street firm this week to cool on the red-hot IPO.

There are now no analysts on Wall Street who recommend buying Beyond Meat, a rare phenomenon for a company that just went public last month and comes as a result of its monster run outpacing even the must bullish expectations.