For the first time in a while, First Solar (FSLR) showed up on the unusual options volume radar. The domestic solar company has seen its stock price perform nicely since 2020 and the push for more green energy solutions in the US. The options on FSLR traded 6x the normal volume on a day last week, with 88% of the activity in calls. That much of a disparity between calls and puts tends to be a bullish signal. The largest trade of the day was a block of over 1,400 out-of-the-money March calls that were purchased.