Indexology^® Blog

How are indices helping investors assess the growing range of thematic solutions? S&P DJI’s Ari Rajendra and BlackRock’s Jay Jacobs dive into the expanding landscape and the innovations and data helping investors at the leading edge of thematic trends.

How are muni indices helping market participants navigate the yield curve in the current climate? S&P DJI’s Jennifer Schnabl and Vanguard’s David Sharp take a closer look at the S&P Intermediate Term National AMT-Free Municipal Bond Index and S&P California AMT-Free Municipal Bond Index.

Commodity markets remain on top of the asset class leader board with inflation drawing the ire of the Fed and other asset classes. The upside surprise in U.S. inflation spotlights the potential benefits of commodities as a diversification tool. The S&P GSCI, the leading indicator of broad commodity performance, has produced double-digit returns in 2024, currently up 12.8% following the uptick in consumer prices. Gold continues to reach all-time highs, surpassing USD 2,344 per troy ounce while cocoa is the best-performing commodity, nearly tripling over the past year. Both components are included in the S&P GSCI, helping produce a diversified exposure to the broad commodity market. For perspective, bitcoin has captured sizable flow into ETFs, and the S&P Bitcoin Index is “only” up 140%, less than half of what cocoa has done in the same period. The S&P GSCI has benefited from holding gold and cocoa, but oil is the largest component and has delivered the strongest historical sensitivity to inflation. The petroleum sector within the S&P GSCI is up 21.4% YTD, with precious metals up 13.2%. In this post, we review the last half century of commodity performance, which covers inflationary regimes and central bank responses.

Commodities have done well when inflation remains elevated, and the Federal Reserve maintains a defensive posture. Breaking inflation into low, medium and high inflationary environments, commodities have experienced double-digit annual gains when inflation exceeds 2%. The average one-year return when inflation measures between 2% and 4% is 13.3%. Exhibit 1 shows the breakdown by inflationary tiers.

Another way to measure commodity performance is when the Fed maintains a restrictive stance, defined by the Fed Funds Effective Rate exceeding target inflation of 2%. Again, going back the full history of the S&P GSCI to 1970, we measure the annualized returns during such periods and compare that with accommodative environments. The S&P GSCI achieved average annualized returns of 10.6% over the 39 years when the Fed Funds Effective rate was above 2%. This compares favorably to 0.9% average annualized returns during the 16 years the Fed held the effective rate below 2%. We recently covered this in a blog post, and updated the data through April in Exhibit 2.

A broad basket of commodities has historically helped provide diversification and inflation protection. Unlike traditional asset classes such as stocks and bonds, commodities have unique risk and return characteristics that are often uncorrelated with other investments. The S&P GSCI’s 10-year correlation to the S&P 500^® is 0.4, while its correlation to the S&P GSCI Gold component is zero and it has a negative correlation of -0.16 to the S&P U.S. Aggregate Bond Index. Including commodities could help reduce overall volatility and enhance risk-adjusted returns by spreading risk across different asset classes. Additionally, commodities have historically exhibited a positive correlation with inflation, making them a possible hedge against rising prices. As prices for commodities tend to rise during inflationary periods, broad-based commodity indices like the S&P GSCI have demonstrated low correlation to other asset classes as well as positive performance correlation to persistent inflationary environments.

S&P Dow Jones Indices launched a consultation in May 2023 proposing certain methodology changes to the S&P/BMV IPC with the overall goal of reducing single-stock concentration and simplifying rather complex eligibility and selection criteria.

After receiving feedback from market participants, a revised version of the proposal was approved in September 2023 and a two-phased implementation was announced starting with the March 2024 rebalance and concluding in June 2024 (see Exhibit 1 for a summary of the changes).

The main objective of these changes was to improve diversification by reducing stock concentration in the index. Exhibit 2 shows how the top five stocks represented about 53% of the index’s weight on average over the past five years and the impact of the first phase of the implementation during the March 2024 rebalance.

The decrease in concentration is achieved by reducing the weight caps for single stocks to 15% and the aggregate weight of the top five stocks to 45%. Additionally, a new rule to limit the weight of relatively illiquid stocks was introduced to address the potential for higher weightings of less liquid securities.

The additional changes in the eligibility and selection criteria were made in order to provide flexibility under different market conditions and to simplify the methodology.

Regarding the implementation, all changes except for the updated constituent weighting rules were implemented in full at the March 2024 rebalance. Changes to the constituent weighting caps will be implemented in two phases.

The first phase applied a 0.5 factor to the weight reduction of the capped stocks, with the resulting weight redistribution among the rest, for the March 2024 rebalance, with the intent of incorporating approximately half of the weight changes under the new rules (see Exhibit 3 for the new constituent weights in this first phase).

The final phase of implementation will be conducted at the June 2024 reweighting, where the changes in constituent weightings will go into full effect.

In summary, the methodology changes will contribute to improving diversification and flexibility in the S&P/BMV IPC, while at the same time, simplifying the methodology for the benefit of market participants.

What are the potential benefits of a passive approach to covered calls? S&P DJI’s Phil Brzenk and ProShares’ Simeon Hyman take a closer look at the S&P 500 Daily Covered Call Index, its performance, and why the index uses a daily approach vs. a more standard weekly or monthly approach.