Data Refer To Baa Grade Bonds. Data Were Checked In Part With Annual Averages In Federal Reserve Bulletins, Annual Reports Of The Federal Reserve Board, And Moody'S Industrials. The Survey Of Current Business Is The Only Source That Publishes The Series In Its Entirety. Moody'S Bond Survey Publishes Only The Daily Figures From Which The Monthly Series Is Made Up. Moody'S Is The Original Collecter Of The Data. Source: U.S Department Of Commerce, Survey Of Current Business, November 1937, P. 19 And Following Issues.
This NBER data series m13036 appears on the NBER website in Chapter 13 at http://www.nber.org/databases/macrohistory/contents/chapter13.html.
NBER Indicator: m13036
Release: NBER Macrohistory Database
National Bureau of Economic Research, Yields On Corporate Bonds, Lowest Rating for United States [M13036USM193NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M13036USM193NNBR/, October 6, 2015.