Holiday futures markets are around the corner
Perhaps the most valuable lesson I've learned in my decade (plus) time as a commodity broker is that holiday markets are not to be reckoned with. Volume is light and trading desks are filled with the second, and third, string staff. As a result, the markets can make dramatic and uncharacteristic moves. An example of this that still stings, is last year's Thanksgiving day crude oil futures collapse. The market was technically closed for the holiday, but the CME decided to let futures trade for an abbreviated session on the morning of Thanksgiving day. As a result of the light volume, and an ill-timed OPEC meeting, crude oil fell roughly $7.00 in single clip. In a nutshell, this is the time of year to keep trading light.
In regards to the S&P and Treasuries, the holidays have an interesting influence on trade. Nearly every year (I'm not exaggerating), we see an end of the year melt-up. It is often a very slow moving grind, but it eventually adds up to a significant move.
More pertinent to the current market; the week of Thanksgiving is statistically highly bullish. In fact, the Stock Trader's Almanac suggests that it might be a good idea to look for weakness prior to Thanksgiving to enter bullish trades, and strength after the holiday to exit. In fact, in the Dow, netting the day before and after Thanksgiving day has combined for only 13 losses in 62 years.