On March 12, the Dow dropped 1700 points and early trading halted as the Wall Street reeled from a difficult week. Financial experts say the stock market has entered a bear market after a long bull run. To get perspective on what’s causing latest stock market volatility, Carloee McGrath sat down with Matthew Farkas and Sylvia Callan. Farkas is the Vice President and Head of Fixed Income for St. Germain Investments in Springfield. Callan is a portfolio manager at Gage Wiley, the Northampton office of St. Germain.