2 Solar Stocks Sliding as Tax Bill Moves to Senate

Group 1: Market Reaction - The solar sector is facing challenges following the U.S. House's passage of a bill aimed at lowering taxes and increasing military spending, which may lead to the termination of several green-energy subsidies [1] - Enphase Energy Inc (NASDAQ:ENPH) stock has dropped 14.9%, trading at $40.24, marking a more than four-year low and the largest single-day percentage loss since April 2023, with a year-to-date decline of over 42% [1] - First Solar Inc (NASDAQ:FSLR) shares are down 4% to $156.82, extending a 38.2% year-over-year deficit and facing its fifth loss in the last six sessions after failing to surpass the $200 level [3] Group 2: Trading Activity - Options trading for ENPH has surged, with 38,000 calls and 37,000 puts traded, which is four times the typical volume, with the July 50 call being the most popular contract [2] - Short interest in FSLR has increased by 22.6% over the past two reporting periods, with 11.03 million shares sold short, representing 10.9% of the stock's available float [4]