SpaceX IPO, potential for a large index-fund short squeeze

If SpaceX goes public, large-scale buying demand from index funds could emerge. If it is added to major indexes after listing, ETFs and index funds that track those indexes would have to buy shares in line with their portfolio weights. In this process, buying demand could substantially exceed the publicly tradable shares.

SpaceX is reportedly characterized by a large proportion of shares held by existing shareholders and a limited public float. When the number of tradable shares is small, the same buy order has a greater impact on the share price. This has been cited as a factor that could increase the market impact upon inclusion.

A short squeeze occurs when holders of short positions buy back shares to reduce their losses. If forced buying resulting from index inclusion occurs at the same time as the liquidation of short positions, price volatility could increase substantially. Some derivatives and leveraged strategies could amplify such movements.

The timing of the listing, whether the company will be included in the index, and the timing of any inclusion have not yet been disclosed. The key variables are the index inclusion criteria and how the final size of the publicly available shares will be calculated. The scope of the impact remains unclear until the relevant information is disclosed.

Investors should first check the size of the publicly available shares and whether an index inclusion schedule has been set in the listing-related disclosures. If index inclusion is announced, they should review changes in the holdings weights of ETFs that track the index. Checking position changes in the options and futures markets as well can help them assess the scope of the impact more accurately.