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挑战index(二)# Investment - 投资
y*t
1
问题(二) Look they are dancing together, what happend there?
Pull whatever stock chart program you like, eg. yahoo.
Then plot out the ^GSPC, ^MID, ^SML, what do you find? what if you switch to
different range. what do you find?
Yes, they are dancing together!
Just like there in the music hall, when music starts, everybody starts the
same dance. That is also true, no matter what range you pick, what start
point you pick, they are dancing together, well sort of.
But, how come? I thought they are supp
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