What happened Shares of packaged food company B&G Foods (NYSE: BGS) dropped a quick 10% on March 3. The big news was earnings, which had come out after the closing bell on March 2. Investors weren't pleased, though on the surface the results were pretty solid. So what B&G Foods brought in $510 million worth of revenue in the fourth quarter of 2020, up 8.5% year over year. Earnings for the quarter were $0.19 per share, up nearly 19% compared to the final stanza of 2019. In the packaged food space those would normally be pretty solid numbers...even good ones. But 2020 was not a normal year, and investors were clearly looking for something more, noting that these results were below analyst estimates. Image source: Getty Images. However, the problem isn't really in the year-over-year numbers, it's in B&G Foods' sequential quarterly results. Second-quarter 2020 sales increased 38% year over year, with earnings up nearly 87%. Third-quarter 2020 sales were higher by 22% year over year, with earnings rising 37%. Compared to those results, the fourth quarter was something of a letdown. In fact, the trend here suggests that the early sales boost from the economic shutdowns and social distancing used to slow the spread of the coronavirus are quickly starting to ebb. That is most likely what has investors in a negative mood this morning. Now what B&G Foods is close to lapping what are likely to be very difficult comparison quarters as 2021 gets underway. If the current sales trends hold, quarterly updates this year could be less than inspiring, at least in the second and third quarters, which were outliers compared to the first and fourth quarters of 2020. Wall Street can be mercurial at times, particularly when earnings results disappoint. Long-term investors might want to steel themselves for some volatility here over the next few quarters. 10 stocks we like better than B & G FoodsWhen 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 B & G Foods 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 February 24, 2021 Reuben Gregg Brewer has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.Source