What a difference a better explanation makes!

After a month of topsy-turvy trading on the heels of comments from the Federal Reserve that it may soon scale back QE3 -- its $85 billion monthly bond-buying program meant to keep lending rates near historic lows -- Ben Bernanke did his best mea culpa to calm the markets. With economic data signaling the potential for further stimulus, Bernanke's comments helped calm skittish markets into one of the best gains of the year -- and, subsequently, another record high for the broad-based S&P 500 (INDEX: ^GSPC).

By the end of the day, the S&P 500 had eclipsed yet another all-time record closing high, rising by 22.40 points (1.36%), to close at 1,675.02. This also marked its 10th gain in the past 12 sessions, and completely wiped out June's minor correction.

Leading today's big gains is semiconductor chip maker Advanced Micro Devices (NYSE: AMD), which leapt 11.8% after two analyst rating upgrades. Vivek Arya at Bank of America/Merrill Lynch upped his rating on AMD to buy, from underperform, while boosting his price target to $6, from $2.50. Similarly, Canaccord Genuity analyst Bobby Burleson raised his rating to buy, from hold, and upped his price target to $5, from $3. Based on yesterday's closing value, both price targets implied upside of 51% and 26%, respectively. With key processing wins in both new gaming consoles, the Xbox One and PlayStation 4, AMD's fortunes could be just months from turning around.

The other two big gainers were again the nation's largest homebuilder D.R. Horton (NYSE: DHI), which added 9.2%, and Lennar (NYSE: LEN), the homebuilder with the best margins in the sector, which advanced 8.3%. As you might imagine, the impetus behind the move are the comments made by Bernanke that the U.S. central bank doesn't have any intention of scaling back QE3 anytime soon. The Fed's monetary easing has been a big reason why 30-year mortgage rates have remained at historic lows, and are one reason the housing sector found a bottom. If QE3 is continued for a longer period of time than the Street expects, it should keep rates near historic lows, and spur home buying.

Call me a bit skeptical, though, as it seems more like trying to squeeze blood out of a turnip. Even if the Federal Reserve extends QE3 for a few months, we're still looking at the inevitable paring back of its bond purchases, and the likely return of interest rates to their historical norm, which could cripple the now-spoiled U.S. consumer. I'd tread this sector with extreme caution.