Investors renewed their rush into Tesla Inc.’s (Nasdaq: TSLA US) shares Thursday after Elon Musk’s electric vehicle maker posted its ninth straight quarter of profits, propelling its stock toward new highs. The four-month rally took on new life after the company reported gross margins, a key measure of its profitability, widened by almost 30% in the latest quarter. That sent Tesla’s stock up as much as 3.9% to $899.50 in New York, before closing at a record $894.