Could have, but the trend started at least reasonably before the re-balance, and has definitely continued after. I might be more inclined to believe it, if it bounces back significantly in the next few weeks.
To tell you the truth, the more I look at what this has done recently, I really don't think the Russell re-balance is any reasonable explanation for how much this has tanked in the last 3 weeks. There's something more to this.
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