Compiled by ETF.com Staff Bill Gross To Retire From Janus Henderson (MarketWatch) The “bond king” is leaving the firm March 1 after four years since joining post-PIMCO. Why The Oldest, Biggest ETF Isn't Always The Best (CNBC) Bob Pisani, CFRA's Todd Rosenbluth and Astoria Portfolio Advisors’ John Davi discuss why. How Concentrated Are Fund Assets? (Think Advisor) New report shows asset concentration differs among open- and closed-end funds, ETFs and variable annuities. Fed Changes Game Plan (Invesco) Federal Reserve signals major change in approach. Global Growth To Slow In 2019? (BlackRock) What a potential synchronized global slowdown this year could mean for central bank policies.