fed chairman janet yellen. alexis christoforous has more. good morning, alexis. >> good morning, anne-marie. asian markets were mixed. tokyo's nikkei added a quarter percent. hong kong's hang seng added a quarter percent. tomorrow janet yelin plans to lead the federal reserve. in two letters to lawmakers released yesterday, yellen again voiced her support for the fed's bond-buying program. she wrote that if the fed had not acted aggressively, the economy would likely be weaker. >>> stocks in this country were lower yesterday, mostly due to some disappointing corporate earnings forecast. the dow jones industrial average slipped nearly 9 points. the nasdaq dropped 17. >>> the federal government has opened an investigation into the potential for fires in the tesla model s electric cars. the national highway and safety transportation administration is looking at two incidents.