JPMorgan analyst Doug Anmuth raised his price target for Twitter to $46 from $40 saying the company yesterday reported a "clean" Q1 with health and product improvements. Twitter's investments in health continue to yield results, Anmuth tells investors in a research note. He views the company's Q1 results as "strong" with accelerating monthly daily active users and bottom-line beat. With monthly daily active users growing from a healthier base, Twitter is becoming increasingly relevant to advertisers, and its margins can move higher, contends the analyst. He reiterates an Overweight rating on the shares.