It also means researchers who leverage Twitter's API to collect public data from the site will lose a key resource -- again, unless they pay, CNN reported.

Do you find the symbols on a container of motor oil baffling? Even if you understand most of them, you may not know the meaning of the three letters "API." ...

APi (APG) has been upgraded to a Zacks Rank #2 (Buy), reflecting growing optimism about the company's earnings prospects. This might drive the stock higher in the near term.