Otter Tail Corporation is a diversified energy company that operates through its subsidiaries in various sectors, including electric utility, manufacturing, and infrastructure. They provide electricity, heat, and energy-related products and services to customers in the Upper Midwest region of the United States.

The technical analysis of Otter Tail Corporation indicates that the stock is currently building a base. This base formation suggests a period of consolidation and stability, where the stock price is finding support at a certain level.

However, more recently, the stock has experienced a sell-off. This indicates a decline in buying interest and a potential shift in sentiment. Investors should closely monitor the stock's performance and assess the reasons behind the recent sell-off.

It is important to consider the implications of the base formation and the recent sell-off when making investment decisions related to Otter Tail Corporation.