Key TakeawaysThor Industries reported a fiscal first-quarter loss, when analysts had been expecting a profit. CEO Bob Martin attributed the disappointing results to a "soft retail and wholesale environment."The Airstream parent's stock slid Wednesday and has fallen nearly 9% this year. Airstream parent Thor Industries (THO) posted a surprise fiscal first-quarter loss before the opening bell Wednesday, sending shares slightly lower intraday. Revenue for the RV maker fell 14% year-over-year to $2.14 billion, ...