Options Expiry
Bear in mind this week is options expiry, where options expire on Friday, May 21, and once again on the Tuesday afterwards on the COMEX:
http://www.optionsclearing.com/about/publications/expiration-calendar-2010.jsp
A decline in interest rates(meaning an increase in the face value of treasuries and long term U.S. sovereign bonds) are perhaps forecast in the futures markets this week as well, just look at this link in the morning @7:30 am on any trading day:
http://quotes.ino.com/analysis/extremes/futures
-F6