Traders are bracing for the loss of a crucial stock market driver

One of the most compelling reasons to invest in the stock market may be going by the wayside. At least that's the thinking of investors who speculate on the size of dividend payments. Often used by companies to sweeten the pot for investors looking for periodic cash distributions, dividends are seen coming in lower than previously forecast. The aggregate expected S&P 500 payout of $54.70 a share has slipped by 6.2% since peaking in early March, and it now sits at its lowest since mid-January, ac...