Considering the wild swings that have practically become par for the course, investors and traders probably don't need much convincing to keep a close eye on the market Friday. Were these normal times, the session would likely set up as a nice way to ease into the weekend. But these are hardly normal times. And with options expiring, which can lead to above-average volatility, be ready to hold on for what could be a very interesting session. The earnings calendar is practically bare, with AnnTaylor ( ANN), Jack in the Box ( JBX) and Qiao Xing Mobile ( QXM) the only names of note. As for the expected economic numbers, net foreign purchases, industrial production and capacity utilization are due. Additionally, Federal Reserve Governor Randall Kroszner will give a speech on the economic outlook at a conference in New York. Elsewhere, Cal Dive International ( DVR), Sunoco ( SUN) and Noble ( NBL) are among those presenting at a Bank of America conference, and Medco ( MHS) is holding an analyst day. On TheStreet.com, check in early for the latest version of the popular column "The Five Dumbest Things on Wall Street This Week." Also, Liz Rappaport will examine why so many bellwethers of the economy fell flat in the third quarter and gave poor outlooks, and Michaela Cavallaro will tell you how you can get tax credits for installing energy-efficient windows and storm doors.