A feature that provides a view of an account's activity for particular Supplemental Year-End Tax Information related to Mortgage Pools, Grantor Trusts, Commodity Trusts, HOLDRs, Royalty Trusts and REMIC CDOs. Supplemental Year-End Tax Information includes: Supplemental Summaries, Summaries by Security, Original Issue Discount Detail, Gross Proceeds Detail and Gain/Loss Detail FIFO.