An Amazon-based retail trade has quadrupled the stock market's return this year

You could've made four times the S&P 500 this year if you fully embraced an Amazon-driven retail apocalypse.
All you had to do was make bullish bets on Amazon while placing bearish wagers on the most-shorted retailers, in proportion to their short interest, according to data compiled by the financial-analytics provider S3 Partners. Putting $100 million to work on either end of the trade would've netted a 43.7% return in 2017, according to the firm's data.
That's more than quadruple the bench