22 /// Class implements Fed's US primary credit rate as risk free rate, implementing <see cref="IQLRiskFreeRateEstimator"/>.
23 /// </summary>
24 /// <remarks>
25 /// Board of Governors of the Federal Reserve System (US), Primary Credit Rate - Historical Dates of Changes and Rates for Federal Reserve District 8: St. Louis [PCREDIT8]
26 /// retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PCREDIT8