KEY POINTS
  • Argus Research upgraded Twitter to a Buy with a $25 price target.
  • The firm expects a return to annual revenue growth by 2018.
  • Ritholtz Wealth Management's Josh Brown thinks Twitter needs another strong quarter to establish a positive trend.

After spending six quarters on the sidelines, one Wall Street analyst sees big upside ahead in Twitter for investors who can stick around for a "long-term turnaround".

Argus Research upgraded Twitter to a "buy" because of increased user engagement and the belief that Twitter will return to annual revenue growth in 2018.