https://www.reuters.com/article/us-tesla-musk-ubs/tesla-shares-sink-after-analysts-warn-on-model-3-margins-musk-interview-idUSKBN1L21EP >Tesla Inc's shares slumped 8 percent on Friday after Chief Executive Elon Musk told the New York Times his tweet about taking the company private was not reviewed by anybody, and a brokerage raised doubts about the profitability of the electric carmaker's Model 3 sedan.