certainly validation that facebook is one of the most important companies. the move will open up to a lot of investors, people like you and me, for example. there are 1,000 mutual funds that use s&p 500 as their benchmark. it could be part of your retirement portfolio sometime soon. of course that does mean more money for facebook. wall street will celebrate christmas. christmas eve, trading will end three hours early. financial markets will be closed christmas day. it's also the final week of the year, the time we see a santa claus rally. they typically gain 1 1/2%. it's unclear if santa will appear this year. data on manufacturing, housing, and spending could also impact trading. that's what is coming up this week on wall street. pamela, victor. >> zain, thank you so much.