Source: DiCecio, Riccardo
This series is the sum of nominal GPDI Fixed Investment and PCE Durables.
For additional details see: R. DiCecio (2009). "Sticky wages and sectoral labor comovement," Journal of Economic Dynamics and Control, 33(3): 538-53. (http://dx.doi.org/10.1016/j.jedc.2008.08.003).
DiCecio, Riccardo, Nominal Investment [NINV], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/NINV, February 19, 2018.