ruben ramirez, n, neyork >> susie: on wall street, the trading day started out quietly, but those comments from angela merkel that we td you about put vestors in a buying mood. stocks closed at their highest level since april, putting the s&p within striking distance of a four-year high. the index ended up almost ten points. the big theme of the day was retail, with many big chain stores reporting quarterly earnings. but networking and home-building stocks also did well. let's start with wal-mart, the biggest decliner in the dow. the world's largest retailer posted disappointing quarterly revenues and profits, due to slowing sales in the u.s. the company has been slashing preso lure cost-conscious shoppers, and that has se investors nervous about profit margins. although, the company raised its full-year profit forecast, that didn't do much to help the stock. it fell 3% today, but is still up on the year. dollar tree shares also fell today by nearly dollar, even though second-quarter profits surged more than 25%. that earnings gain was less than many on wall street expected. in addition, t