The stock market's key level is 4190.
Also, options trading volume pops on a takeout rumor.
S&P 500 bulls keep failing to take control.
AMC shares are super-volatile amid a short squeeze. Options can be a way to capitalize on the moves, with a measure of prudence.
Here's how to trade the stock market.
Plus how to trade the bidding war for Kansas City Southern.
How to trade the S&P 500 now.