Otter Tail NASDAQ: OTTR reported second-quarter adjusted diluted earnings per share of $1.66, down from $1.85 a year earlier, as lower PVC pipe pricing weighed on its plastics segment. The company raised its full-year adjusted earnings guidance to a range of $5.68 to $6.08 per share, excluding the after-tax effect of a legal settlement related to PVC pipe antitrust litigation.