The UBS ETRACS Monthly Pay 2xLeveraged Mortgage REIT ETN Series B, maturing on October 16, 2042, is designed to offer returns that correspond to the performance of the Market Vectors Global Mortgage REITs Index. This particular instrument belongs to the broader family of Monthly Pay 2xLeveraged ETRACS. The benchmark index monitors the collective performance of publicly-traded mortgage Real Estate Investment Trusts (REITs) that generate a minimum of 50% of their income from activities related to mortgages. These securities are issued by UBS AG as senior, unsecured debt obligations. Due to its two-times leverage structure relative to the index, the ETN is engineered to double both the upward and downward monthly compounded movements of the underlying index.