Ann: S&P DJ Indices Announces March Quarterly Rebalance, page-71

Looks like someone played another game with the SP - low volume dribble down bought up on the way - which makes it relatively easy to push it back up - then propelled back up with a good sounding announcement - the spike to $5 lasted one day - back to square - all done on low volume with a relatively small amount of money $400k ? someone smart doubled their money and - oh dear the bagholders still believe- listen to Grant Nick and Jim if you have any  brains - ugly stuff
No doubt it will be done again - they have been doing the same trick for a very long time- It does make everything look ok - but all smoke and mirrors IMO