What happened Shares of Moderna (NASDAQ: MRNA) declined by 9% on Monday after Bank of America downgraded its stock. So what Analyst Geoff Meacham cut his rating on Moderna from neutral to underperform and reiterated his price forecast of $150 per share. Meacham's estimate is roughly 13% below Moderna's closing price on Friday and 5% below its current price of $157.48. Moderna's stock fell hard on Monday. Image source: Getty Images. Meacham said investors are valuing Moderna's stock based on a "best-case" scenario of more than $85 billion in total coronavirus-related revenue, despite the potential for rising competition from rival COVID-19 vaccine makers like Johnson & Johnson and Novavax. Thus, he argues Moderna's share price is too high, as it does not properly reflect these risks. Now what Still, it should be noted that not all analysts are as bearish on Moderna's stock. Oppenheimer analyst Hartaj Singh actually boosted his stock price forecast from $178 to $206 and reiterated his outperform rating on Moderna on Monday. Singh said Moderna's ability to produce as many as 1 billion doses of its COVID-19 vaccine in 2021 gives it an edge over many of its competitors. Differing opinions among Wall Street analysts are common, particularly among coronavirus-related stocks. Moderna's stock price, in turn, is likely to remain volatile in the days and weeks ahead. 10 stocks we like better than Moderna Inc.When investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Moderna Inc. wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of November 20, 2020 Joe Tenebruso has no position in any of the stocks mentioned. The Motley Fool recommends Johnson & Johnson and Moderna Inc. The Motley Fool has a disclosure policy.Source