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Comment by lokar

6 months ago

if they weighted (fully) by float (perhaps the average float from the trailing 90 days to the re-balance) it would not be as easy to game. The Nasdaq is accounting for float, but not completely.

Aren't basically all the huge serious index funds float weighted?

  • They are, but SpaceX is trying to get rules changed. They want the index to buy at a multiple of the float, so they release say 5% but get bought as if they had released 15% float. They also normally wouldn't be eligible for index inclusion for ~1 year, after showing multiple quarters of good stewardship, etc. They're trying to bypass all that

  • Yes, the MSCI World and FTSE World that many broad ETFs and funds track are float weighted.

  • Matt Levine wrote (uh, yesterday?) that the Nasdaq 100 was adding it (not a full linear weighting....) right now to accommodate this scam.