The Tricky Schedule

You open the message—it lists a few courses, but one is blurred out.

The screen reads:

I study buyers, I study sellers,
I’m not about money in vaults or cellars.

I look at trade, and what things cost,
And what you gain—or what is lost.

I’m not macro, I zoom in tight,
To see how markets set what’s right.

Demand and supply are where I begin,
In W. P. Carey, I help you win.

Required for business, I’m clear and true—
Now solve this riddle: Which course am I to you?