Yellen: I don't believe we'll see another financial crisis in our lifetime(2017)
foxbusiness.com
foxbusiness.com
She also indicates what kind of financial crisis she means:
> "Yellen said the architecture of the financial system has changed in ways that has made it safer for all parties involved, citing a number of factors including the Fed’s annual stress testing practices that simulate a crisis-like situation including significant swings in the stock market, a decline in home prices and a decline in the unemployment rate."