Definitions, Sources and Explanatory Notes:
Release: Spot Prices
US. Energy Information Administration, Crude Oil Prices: West Texas Intermediate (WTI) - Cushing, Oklahoma [MCOILWTICO], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/MCOILWTICO, April 29, 2016.
FRED BlogOil prices and business fixed investment in structures
FRED BlogThe Canadian dollar and the price of oil