Nov 4 (Reuters) - Peloton Interactive Inc on Thursday reported a quarterly loss compared with a year-ago profit, hurt by its decision to slash the price of its popular fitness bike and higher marketing and shipping costs. The home fitness leader reported a net loss of $376 million or $1.25 per share, for the first quarter ended Sept. 30, compared with a profit of $69.3 million, or 20 cents per share, a year earlier. (Reporting by Kannaki Deka in Bengaluru; Editing by Aditya Soni)