What does it mean for the stock when it's upgraded to a strong buy

Bumble (BMBL) might move higher on growing optimism about its earnings prospects, which is reflected by its upgrade to a Zacks Rank #1 (Strong Buy).

Bumble expects second-quarter revenue between $269 million and $275 million. Shares of the Austin, Texas-based company rose more than 4% in aftermarket trading. Last week, Bumble unveiled its anticipated app refresh, with a new logo, a move announced in February.