Although most stocks aren't that predictable on when they'll be giving dividends, I think I could narrow it down to the week for the big companies.
I suppose if a stock gives off 2% as a dividend, and it swings up and down more than 2%, it's a bad investment. But looking at my only dividend stock, it doesn't seem to be moving around that much around it's dividend time.
Hm. I guess I've answered my own question. Has anyone tried doing this though?