Read the email Elon Musk sent to Tesla employees calling for 'hardcore' control of expenses
Shares in Tesla dipped more than 5% on Friday, after a U.S. safety regulator found its Autopilot system was engaged during a fatal Model 3 crash earlier this year. Elon Musk sent out a companywide email Thursday cautioning employees to take extreme measures to control costs. The Tesla CEO vowed to "Personally review and sign" every 10th page of outgoing payments.