The "Trading" part of S&T has been explained here. What about the "Sales" part?

[barrons]

<p>Link to full article on GS sales</p>

<p><a href=“http://www.nytimes.com/2009/12/24/business/24trading.html?_r=1&ref=business[/url]”>http://www.nytimes.com/2009/12/24/business/24trading.html?_r=1&ref=business&lt;/a&gt;&lt;/p&gt;