Using its own quantitative model and fundamental analysis, the fund dynamically allocates assets across five core asset classes with strong inflation resistance: TIPS, commodities, natural resources, infrastructure, and real estate. It is run as a fund-of-funds that mainly holds other SPDR ETFs.

It suits investors who worry about the loss of cash value caused by rising prices, or who want to diversify their portfolios with real assets beyond stocks and bonds.

State Street Global Advisors launched the ETF in 2012, and it uses an active management approach.

Rather than simply replicating an index, the fund adjusts the weights of assets with high inflation sensitivity according to market conditions. It blends direct commodity exposure with shares of related producers and infrastructure assets, managing volatility while maximizing the inflation-hedging effect.

• A comprehensive asset mix specialized in hedging inflation
• Market responsiveness through active asset allocation
• Risk diversification that takes the correlations among real assets into account

Assets under management (AUM) stand at $1.4B, and the expense ratio is 0.50% per year.

Unlike general balanced ETFs such as CGBL and NTSX in the table, RLY focuses squarely on defending against rising prices. It also differs from trend-following strategies such as CTA, concentrating instead on preserving asset value through the direct appreciation of real assets and inflation-linked returns.

In an environment of persistent inflation concerns, the fund has shown a positive trend thanks to strength in the commodity and energy sectors, and it has reacted sensitively to the release of price data.

During periods of rate hikes and high inflation, defensive capital seeking to protect the real value of portfolios has been flowing in steadily, and the fund is drawing attention as an investment alternative for real assets.

Its strength is inflation resistance through a variety of real assets, but it may underperform ordinary stocks or bonds when prices are falling.

While ALLW in the table pursues Bridgewater's All Weather strategy to handle every season, RLY specializes in one particular season: inflation. If you want to focus only on commodities, you can consider DBC; to raise the real estate weighting, VNQ; and if you want an inflation hedge with a higher equity weighting, GNR can be an alternative.

These are the key factors to consider before investing in RLY. You should judge whether the current rise in prices is temporary or structural, and define the fund's role within your overall portfolio.

Inflation-hedge assets can show large swings depending on interest rate policy and the global business cycle, so approach the fund with a long-term view of preserving purchasing power rather than focusing on short-term results.

In inflationary periods that are hard to handle with traditional asset classes alone, this product can serve as excellent insurance that protects the real value of a portfolio.