On this edition of Wall Street Week, Rick Rieder BlackRock CIO of Global Fixed Income and Afsaneh Beschloss, RockCreek Founder and CEO wrap up the week in markets as stocks went on a rollercoaster ride. Kevin Mayer, Candle Media Co-CEO talks about streaming services and subscriber growth. Plus, former U.S. Treasury Secretary Lawrence H. Summers weighs in on CPI numbers and how he believes the fed should have a meeting now to end QE.