Tesla Sends S&P 500 Crowd on a Wild Ride of Surges and Crashes.

All of which has given the S&P 500 a little taste of the meme fever that has become to represent the stock mania that swept through the country this past year. (Bloomberg) -- There was a sense among Wall Street types a year ago that Tesla Inc.'s entrance into the S&P 500 Index would calm the stock. [Extracted from the article]