Tesla shares extended their decline in Thursday’s pre-market session, falling as much as 6.60%, after closing 4.42% lower in Wednesday’s after-hours trading. The drop followed Elon Musk’s warning that the company “probably could have a few rough quarters” as U.S. incentives are set to expire on September 30. “Well, we’re in this weird transition period where we will lose a lot of incentives in the US,” Tesla’s chief stated. On the other hand, autonomy is most advanced and most available from a regulatory standpoint in the US.”“Does that mean we could have a few rough quarters? We probably could have a few rough quarters.