Canaccord analyst Maria Ripps raised her price target for Twitter to $42 from $32 but maintained a Hold rating. Twitter's Q1 results brought stronger than expected user trends, advertising revenue, and profitability, Ripps tells investors in a research note, but adds that revenue growth comparisons get more difficult through the year, and the reiterated 20% operating expense growth outlook for the year implies near-term margin compression. Ripps says she thinks Twitter's premium valuation appears to be fairly full without line-of-sight towards significant upward estimate revisions.