(Bloomberg) -- Four major events over the next 13 trading sessions will be the key catalysts in determining whether this year’s stock-market revival gets derailed or starts rolling again after a February slump.Most Read from BloombergMortgage Lenders Are Selling Homebuyers a LieChina’s Modest GDP Growth Target Reduces Need for More StimulusWorld’s Riskiest Markets Stumble Into Crisis With Dollars ScarceAmazon Is Closing Its Cashierless Stores in NYC, San Francisco and SeattleRussia Is Getting Ar