The largest u.s. residential solar installer SolarCity (SCTY – Snapshot Report) has made a nice comeback at the start of the final month of 2015. The stock jumped over 19% in the last week.

The massive gain for this solar firm came on the back of the news that options trader Jon Najarian has added SCTY in his portfolio after “spotting unusual options activity.” As SolarCity strongly bounced off its 52-week low of $24.07 reached on November 11, Najarian speculates that the stock might be ready to soar further (read: Solar ETFs to Watch Following Q3 Results).