Joining the Nasdaq 100 Forces Index Funds to Buy Your Stock
Index funds copy a list by rule, so changing the list can create instant demand for a new stock.
The Prof G Pod with Scott Galloway · The Week | Is the Market Rigged for Insiders?Funds that track the Nasdaq 100 generally have to buy a newcomer when it joins the list. The buying happens by rule, not because millions of savers studied the company and decided they want it.
The Nasdaq 100 is a roster of 100 large companies that underlies many popular funds owned by ordinary investors. An index fund is a fund that copies such a roster, holding the same stocks in the same proportions, instead of picking winners. When the roster changes, the copies generally change too.
That is why a recent change drew attention. SpaceX gained accelerated entry to the Nasdaq 100 after eligibility requirements were rewritten.
Michael Green, a researcher of stock indexes, said, "I think it is candidly quite manipulative." He was talking about the legal setup. Index investing, he said, has received special treatment under the law, without the same requirements that active stock picking faces for fiduciary standards, or the duty to act in a client's best interest, and suitability standards, or the duty to make sure an investment fits the client.
If a manager who picks stocks suddenly changes strategy, Green said, investors can sue. In the index world, he said, managers are largely protected, in his words, "as long as the index methodology has changed rather than simply the inclusion of a new stock."
In the SpaceX case, he said, the plan was published in advance and opened for comment, adding, "My understanding is the comments were almost universally negative," and that he submitted several himself. In this case, he said, the big winners are those seeking liquidity, the insiders looking to sell shares.
Questions people ask
Why can't an index fund just decide not to buy a new addition?
A fund that promises to track an index is judged on how closely it copies the index. If it skips a big new stock, its returns will drift away from the index, a gap investors watch closely. So most funds buy the addition quickly to stay in line.
Does all that automatic buying push the stock price up?
Often yes, at least around the time of entry. Index funds all need to buy at around the same time, adding a large, predictable buyer. Studies find stocks added to major indexes tend to rise on the announcement, though the long-term effect varies.
Why do index funds get different legal treatment than active managers?
Index funds are treated largely as passive vehicles following a published rulebook, not as advisers making judgments about each stock. That disclosure-based approach has historically meant lighter fiduciary review than active management. Critics like Green argue that distinction no longer fits how much power indexes now have.