The FRED series Mutual Fund Shares - Assets - Balance Sheet of Households and Nonprofit Organizations is now known as Households and Nonprofit Organizations; Mutual Fund Shares; Asset.
The source series id is FL153064205.Q.
This series no longer appears in Table B.101.
This data still updates, to see data for this series, go to https://fred.stlouisfed.org/series/HNOMFAQ027S.
For further information see the assistance provided in the guide to the Financial Accounts at http://www.federalreserve.gov/apps/fof/.
Board of Governors of the Federal Reserve System (US), Households and Nonprofit Organizations; Mutual Fund Shares; Asset (DISCONTINUED) [MFSABSHNO], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/MFSABSHNO, February 17, 2019.