Task: Translation
Input (English): New York Stock Exchange (NYSE) announced last Wednesday that it has agreed definitively to merge with Chicago-based Archipelago Exchange (ArcaEx) and form a new publicly traded, for-profit company known as NYSE Group.
Output (Chinese): 纽约证券交易所（NYSE）上周三宣布，该交易所已经明确同意与位于芝加哥的群岛交易所（ArcaEx）合并，从而组成一个新的营利性公开交易集团，即纽约证券交易所集团。