Shares of Twitter Inc. are up 0.2% in Tuesday trading after Wells Fargo analyst Peter Stabler raised his price target to $42 from $32. "After multiple quarters of declining ARPU [average revenue per user] growth, monetization per user has turned the corner, where our contacts point to salesforce stabilization and a tightened go-to-market sales strategy behind video inventory as key drivers of improved marketer sentiment," Stabler wrote. "With video, we see a sustained opportunity for improving monetization efficiency and expect content partnership efforts will continue to strike a balance between niche offerings and high-profile content bundles." Still, Stabler maintained his market perform rating on the stock, citing engagement disparities between Twitter and services like Facebook and Instagram. "We have long been concerned that the core service remains too difficult for average users and consequently, Twitter continues to experience engagement challenges," he wrote. Twitter shares have gained 155% over the past 12 months, while the S&P 500 has risen 13%.