It’s September, and the stock markets are slippery. These are also the times when you’d want to put some cash to good use. Dividend Kings, in particular, can be an excellent source of passive income when your stocks aren’t behaving very well. Dividend Kings are stocks whose dividends have increased annually for at least 50 years, and that includes years of the worst stock market crashes in history. Only 31 stocks are in the club right now.