The S&P 500 has to hold this level or risk a 10% correction, warns strategist By: MarketWatch February 25, 2020 at 07:01 AM EST Investors tempted to buy Monday’s brutal stock selloff need to bear this one big level in mind, says our call of the day. Read More >> Related Stocks: Apple Expedia HP Inc MasterCard Microsoft Moderna Inc United Airlines Holdings Inc Visa Xerox Corp