ross gerbshgerber. >>> coming up, why marijuana isn't quite the cash crop some ca test . >>> here's a look at what to wi. on tuesday a number of dow components repor earnings. j&j, p and g, travelers and verizon. al on tuesday the world economic forum in davos gets underway bringing together leaders and heads of state to discuss the global economy. on wednesday we will find out if there was a rush to buy homes at the end of the year with the release of existing home sales. tomorrow is the one year ext anniversary of president trump's inauguration. it's been an eventful year in washingt of co on wall street. duri the past year the s&p 500 index returned more than 25% and according to market watch, more than half of the index's 500 stocks have seen gains of 20% or more. >> the fast growing marijuana industry is facing a growing number of challenges, even in states where recreational pot is legal. take california for instance. legalized reation creational marijuana went into effect at the start of the year. and many thought business would with boom. but as adee dee roy reports, that's no