If the daily 10-Year Treasury Constant Maturity minus the 2-year Treasury Constant Maturity according to the Federal Reserve Economic Data (FRED) series, measured in percent and not seasonally adjusted, between Issuance and , is above 0%, then the market resolves to Yes. Outcome verified from Federal Reserve Bank of St. Louis.
Please note that intraday changes will not be reflected in the Underlying, as FRED only posts a single value per day.