NYX 360: 21 March, 2011

BEL 20: 20 years and counting (NYX/Futures)

New York Portfolio Clearing to launch (Zacks)

NYSE proposes allowing designated market makers to use e-mail (Dow Jones)

NYSE Amex Options files plans to sell stake to member firms (Bloomberg)

IndexIQ Global Agribusiness ETF to launch on NYSe Arca (Benzinga)

Small size, fast growth make Chinese IPOs hard to price (Reuters)

Mixed message from U.S. IPOs (WSJ)

NYSE announces quarterly changes to family of indexes (NYX)

On this day in 1888, a rival stock exchange -- the Consolidated Stock Exchange -- was organized through the merger of several markets in mining and petroleum company shares. (NYX)