On current trends, Social Security will begin spending more than it takes in through payroll taxes in 2018, and in 2042 it will deplete its accumulated trust fund.

ECONOMIST: Holding the line? | The

The government is not drawing on accumulated savings or retained profits to fund its spending.

FORBES: The Left's Grip On The American Economy

Almost 3 decades later, his model and a mutual fund based on it have accumulated quite an enviable track record, even through the financial crisis in 2008.

FORBES: 7 Gifts for People Who Like Money

No matter how you slice it, one thing is clear: the vast majority of Americans working for private employers have not accumulated sufficient assets in their 401ks to fund the retirement income goals they established decades ago.

FORBES: Retirement Dreams for Smaller 401ks -- $15,000 Condos

She says bankers typically fund these investments with their years of accumulated bonuses and stock sales.

WSJ: Honey, They Shrunk My Bonus

The good news for bulls is that in the event of a pullback, we would not expect a decline to be exacerbated by panic selling, since those that have recently accumulated stocks have purchased index or exchange-traded fund (ETF) puts, or VIX calls, as insurance against a correction .

FORBES: Short-Sellers Could Take Market Lower In The Near Term

Investors are also concerned about the financial problems of Chinese solar companies, which have accumulated heavy debt obligations over the past several years to fund capacity expansion, with the support of local banks and government.

FORBES: Chinese Solar Fortunes Shrivel, Leaving Just One Billionaire