It's not often a stock can rise nearly 20% over three quarters and fail to keep pace with its own dividend yield, but that's been the case with Public Storage (PSA).

Normally a stock's dividend yield is inversely affected by a rising share price. But PSA has issued two significant dividend hikes this year that have done more than just maintain a solid yield. PSA's yield is 22.1% higher today than it was at the start of the year, meaning it's inexplicably outgrown those surging shares.