The “sweet spot poison pill” of index weights: SpaceX’s $12.4 billion passive buying is about to collide head-on with a flood of 2.3 billion shares set to be unblocked
A “non-fundamental” rally triggered by index rules
The wave of buying ahead for SpaceX has little to do with its business prospects. It’s more like a mechanical outcome produced after an index construction rule that few people pay attention to gets triggered.
The Nasdaq 100’s quarterly rebalance effective September 21 is expected to raise SpaceX’s weighting from 1.25% to about 1.51%. According to a team led by JPMorgan strategist Min Moon, this adjustment will trigger roughly $12.4 billion in passive net buying.
The direct reason for the jump in weighting is that the free-float ratio has risen from less than 10% after the IPO to nearly 30%—after more than 1 billion shares of lock-up stock are released, the index rules automatically amplify the inclusion weight of this mega-cap with a market value of more than $2 trillion.