The VIXTLT Index, a new measure of volatility for the US Treasury market, offers insights into bond market nervousness, complementing the widely known VIX for equities. This index is designed to provide investors with a real-time gauge of expected volatility in the US Treasury market, focusing on bonds with maturities exceeding 20 years. Comparing the VIX and VIXTLT can help understand how different asset classes react to market stresses, enabling more informed investment decisions.