Some Americans are trading down by going for cheaper items, or shopping at bargain stores.

有些美国人为了省钱而购买更便宜的商品，或去特价商店购物。

Many of their customers are trading down to cheaper cigarettes.

【trade】他们的很多顾客都开始降低消费购买便宜的香烟了。

The general picture is pretty mixed. Shares in the major banks are trading down, while mining companies have surprised analysts with a small rise.

本周总体情况相当复杂。各大银行的股票正在下降，而矿业公司则使分析师们感到惊讶，实现了小幅上涨。

But middle income families and even wealthier families are often trading down to shops like Walmart and Target from higher end shops that they would have gone to before.

但是中等收入家庭，甚至更富有的家庭，经常从他们以前会去的高端商店转向沃尔玛和塔吉特百货等商店。