With stocks on a nine-year bull market run, many of us probably haven’t paid much attention to the yield on our cash accounts. But, maybe we should. Because some firms are playing games with your cash. Games that might leave you, well, shortchanged. Most of us have a cash account of some type—the bank account from which we pay our bills, the money market fund that we’ll tap for emergency expenses, or the brokerage account where our stock and ETF dividends are directed.