Major business events and economic events scheduled for Wednesday:
WASHINGTON _ National Association of Realtors releases existing home sales for November, 10 a.m.
KB Home reports quarterly financial results.
Walgreen Co. reports quarterly financial results.
FRANKFURT, Germany _ The European Central Bank launches its new offer of three-year loans to banks, a measure meant to encourage lending as banks face pressure amid the continent's debt crisis.
TOKYO _ Bank of Japan wraps up a two-day policy board meeting.
TOKYO _ Japan releases November trade data.