(Bloomberg) — Four key situations more than the future 13 buying and selling periods will be the vital catalysts in figuring out no matter if this year’s stock-market place revival gets derailed or begins rolling once more immediately after a February slump. Most Read through from Bloomberg It all begins Tuesday, when Federal Reserve Chair Jerome Powell provides his two-working day biannual monetary plan testimony on Capitol Hill. With the S&P 500 Index coming off its very best 7 days in a thirty day period, investors will be hunting for any hint on the central bank’s interest-charge climbing route. “The marketplace is clinging to just about every one favourable issue…