Warner Bros. Discovery Inc's (WBD) stock is trading lower due to the ongoing SAG-AFTRA and Writers Guild of America (WGA) strikes and the postponement of the release of 'Dune: Part Two'. The strikes are increasing production costs and disrupting the production of films and other content, leading to delays in releasing new content. This impacts the company's ability to generate revenue and meet audience demands, potentially leading to a decline in the stock price.