https://www.reuters.com/article/us-usa-investors-tesla/tesla-heads-to-the-sp-after-meteoric-rise-and-some-investors-want-more-idUSKBN28S0LY >Shares of the electric vehicle maker are up nearly 700% over the last year, a meteoric rise that has punished short-sellers and turned it into the world's most highly-valued automaker.