Float Shares Investability Screen will be expanded to include a float-adjusted market capitalization test for adding or dropping a security. Below is the table outlining the existing and the new rule to go into effect Monday, April 27th.

In conjunction with changing Float Shares Investability Screen, the rounding methodology for Effective Float Factor will also change to account for Float Factor that is less than 10%.

Based on December 2025 ranking, the float-adjusted capitalization for adds, which is ½ bps of the float-adjusted capitalization of index-eligible universe, was ~$3.3bn; the float-adjusted capitalization for drops, which is ⅒ bps of float-adjusted capitalization of index-eligible universe, was ~$0.7bn.