这里的down什么词性？

Question

The remaining two Wall Street investment banks were hit particularly hard on Wednesday with Morgan Stanley down 29 percent and Goldman Sachs down 21 percent.
下降了29%,似乎应该是动词，但with是独立主格结构，不能用原型。介词？副词？后面能直接跟数字表示下降？
出处：
http://edition.cnn.com/2008/BUSINESS/09/18/world.markets/index.html

Answer 1

副词，句中省略了go，应该是go down.
报金融新闻时，一般都省略go