First the rally on news from Europe, then the letdown. That has been the pattern lately on Wall Street, says Nico Marais, head of multi-asset investments and portfolio solutions at Schroders. Marais tells MarketWatch Radio's Larry Kofsky that "we'll have to get used to a situation where there is a relief rally, then a growing realization that whatever measure was taken wouldn't have solved the bigger problems, and the market adjusts accordingly."