"Warner Bros Discovery, Eli Lilly, and Robinhood Among Midday Movers"

Warner Bros Discovery stock fell 17% despite narrowing its third-quarter loss, Eli Lilly stock rose 2% after FDA approval for its Tirzepatide drug, Robinhood stock fell 14.9% due to lower-than-expected revenue, Upstart stock slumped over 26% after disappointing quarterly results, and Rivian stock fell 3.3% despite raising its production forecast.