Ten years ago, it was 2015 -- an eventful year. Nearly 200 countries agreed to reduce emissions and focus on renewable energy, Tom Brady and the New England Patriots were accused of underinflating footballs, and the Supreme Court affirmed same-sex marriage nationwide.

Shares of Tesla Inc. slipped 4.06% to $394.36 Tuesday, on what proved to be an all-around rough trading session for the stock market, with the NASDAQ Composite Index falling 1.89% to 19,489.68 and Dow Jones Industrial Average falling 0.

Tesla stock was edging up in premarket trading Wednesday having dropped in the previous session after the National Highway Traffic Safety Administration launched an investigation into a new feature on its vehicles.