UX designers would do well to learn about business metrics. Business metrics had been a gaping hole in my own education until recently. Companies tend to measure what they think is important. If the stuff you do doesn't track to something the company is measuring then you need to find out why. It could be that the company isn't good at measuring stuff. It could also mean that what you're doing isn't going to get a lot of attention, which isn't a good thing in a slow economy.
I've been working on a paper that explains business metrics to UX designers. Some day soon I'll get it submitted somewhere.