Release: NBER Macrohistory Database
Data Refer To Aaa Grade Bonds. Source: Moody'S Transportation Manual, 1965; Moody'S Bond Survey, Weekly Issues Thereafter.
This NBER data series m13061 appears on the NBER website in Chapter 13 at http://www.nber.org/databases/macrohistory/contents/chapter13.html.
NBER Indicator: m13061
National Bureau of Economic Research, Yields on Railroad Bonds, Highest Rating for United States [M13061USM156NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M13061USM156NNBR, March 24, 2017.