The 1000 is the largest cap names. The 2000 is the smallest cap names. There is no overlap between the two. Together, the 1000 and 2000 make up the 3000. The performance of the 3000 is dominated by the performance of the 1000 (because of the cap effect). So it is quite possible for the 2000 to be down, while the 3000 is up almost as much as the 1000. I hope this makes sense.
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