What happened
Shares of connected fitness product company Peloton Interactive (PTON 2.58%) fell sharply on Thursday, declining more than 5% as of 1 p.m. EDT.
The growth stock's sharp drop was likely driven primarily by a bearish note from short-seller Citron Research Thursday morning.

Image source: Peloton.
So what
Acknowledging on Twitter that Peloton has a "great product at the right time," Citron warned that investors shouldn't "count out [Apple]." Citron pointed to recently published Apple (AAPL 0.83%) patents, including one related to the company's upcoming Peloton-like Apple Fitness+ service.
The patent shows machine learning and artificial intelligence used for customized workouts and a "burn bar" that will be displayed on users' Apple smartwatches.
Now what
Investors should take Citron's research with a grain of salt. The short-seller firm isn't always right and, in some cases, has been very wrong.
There isn't a specific launch date for Apple's new workout subscription service, but the company has said it is coming late this year.