Edit:
Take a look at your charts...
;)
Eyeballing it..looks like a July low of 780 and an August high of about 960...about 23%..and that was the SPX...
True, it declined into an October low after that....essentially a double bottom...
In fact, it was really a triple bottom..(I know you don't do those)....because the low the cyclical bull took off from was around 800 in March of 2003, as we know...
Maybe it will bottomn in October...again...but I think off a good rally again...