Concentrate!

Like you, we have read countless comparisons between today’s enthusiasm for all things AI and the top of the TMT bubble in 2000, with the implication being that stocks are on thin ice. In terms of technical description, the parallels are accurate – the narrowness of the market, the elevated cross-sectional volatility, and the concentration of capitalization in a few issues all look similar to the 2000 top.

One way of looking at this is to count how many stocks it takes to explain the return of the S&P 500. Exhibit 1 shows how the number of stocks increases as the size of a six-month market move gets larger in both directions. It also shows that the narrow markets we have recently lived through are rather like those of early 2000 in magnitude and breadth: over the six months ending June 2024, just a few stocks accounted for all the S&P 500 return. Normally we might expect a return of this magnitude to be driven by hundreds of stocks.

exhibit 1

We are wary of arguments of the form, “the last time technical event X was observed, Y followed, and we see X today, so Y is just around the corner.” While these X-then-Y arguments can be useful prompts for vigilance – here, the investing equivalent of “don’t run with scissors” – they are too limited in scope.

Investment returns ultimately come from three sources: earnings growth, dividends received, and change in the earnings multiple. Our approach could be summarized as taking care of fundamentals by focusing on quality while controlling valuation risk by seeking to avoid overreach on the earnings multiple. If we compare today’s markets with the market top in 2000, we see less to fear today on both the fundamentals and the multiples. 1

In 2000, the top-10 stocks comprised five telecom companies, two networking beneficiaries, a software business, an oil company, and a holding company. At the June 2024 quarter end, we have five cloud tech businesses, two chip companies, a pharmaceuticals company, an oil company, and a holding company (Exhibit 2).