STOCKS TUMBLE: Here's what you need to know

Stocks tumbled on Tuesday, with the S&P 500 touching its lowest level since July.
October was the worst month for the market since January as the S&P 500 shaved its year-to-date gain to 3% from about 6%. The beginning of the third-quarter earnings season punctured the share prices of several companies on the major indices.
And in case you might not have been paying attention, we are now just a week away from the US presidential election. Although, as Business Insider's Akin Oyedele