The current three-day surge is the strongest for the major averages in three months, but with resistance looming the potential for an external factor to spark another downturn (like, say, the Fed ending its QE2 program Thursday) is certainly important to keep in mind.

FORBES: S&P 500 Rally Could Erase Q2 Losses, But Stiff Resistance Looms

The danger is that lawmakers and planners on the federal and state levels will mistake the current tax-revenue influx as a surge to a new, long-lasting plateau.

WSJ: Red Jahncke: The Federal Revenue Surge Won't Last

And with the current Euro-Sterling rate, few would expect a massive surge in southerners going north to get soft drinks - even with Christmas approaching.

BBC: Charity calls for sugar tax in Irish Republic

Businessman Herman Cain, who has his poll ratings surge in recent weeks, proposes a "9-9-9" tax plan that would replace the current code with a 9% income tax, business tax, and a national sales tax.

BBC: Republicans 2012: Rick Perry unveils flat tax plan