Zacks Research downgraded Aurora Innovation from hold to strong sell in a research note issued October 14. The firm did not provide a detailed rationale for the change in the available note excerpt.

The downgrade contrasts with Cantor Fitzgerald’s September reaffirmation of an overweight rating. Aurora’s stock has been volatile this year, and the new rating could add pressure to the shares.

Aurora last reported quarterly earnings in late July. It missed analyst consensus estimates for earnings per share but exceeded revenue expectations.