For decades, fixed-income investments were viewed as the safe, even boring component of an investment portfolio. That’s no longer the case for savvy investors, because fixed income has quietly become one of the most important, nuanced elements of a portfolio. The old reliable 60/40 portfolio is still old but no longer reliable, prompting investors to refine their risk approach and investment strategy.

Generating real income and preserving capital remain the goals. Still, the obstacle course of risks has changed, adding new hurdles such as sticky inflation, complications from the disruptive force of artificial intelligence, and the collapse of the historical relationship between stocks and bonds.

The traditional relationship between equities and bonds supported a portfolio with 60% allocated to equities for long-term growth and 40% invested in fixed-income securities for stability. The simple underlying thesis was that when stocks rise, bond yields fall; when stocks fall, bond yields typically rise, providing a cushion. That worked for many years, until the inverse relationship failed. For high‑net‑worth investors who relied on bonds as a shock absorber, the last few years have shown that this approach needs updating.

Starting in 2022, the Federal Reserve initiated a series of interest rate hikes to fight stubborn inflation. Bond prices move inversely to interest rates, causing both the bond and equity portions of portfolios to drop simultaneously. With yields unpredictable, investors have lost the comfort of the traditional bond-return cushion.

The shift has exposed the downsides of relying solely on traditional bonds—particularly regarding inflation, duration, and credit risk.

Interest rates complicate duration risk. When interest rates rise, the price of existing bonds falls. As the Federal Reserve continues to battle inflation, “higher-for-longer” rates exacerbate the potential losses for investors in long-term bonds. Conversely, focusing on short-term bonds or cash means risking the need to reinvest just as rates drop. Investors are stuck between extending duration and risking mark‑to‑market losses, or staying short and facing the painful task of reinvesting as rates fall.

Credit risks and defaults. Of course, U.S. Treasury bonds are backed by the US government, offering implicit security. Other bond offerings carry varying risks, depending on the issuer's creditworthiness. Moody’s reports that the average one-year probability of default (PD) for US companies is 7.9%, down from 9.1% in March 2025. For high-yield companies, the PD dropped slightly to 3.2%. Both rates are high by historical standards but reflect a gradual decline. For investors seeking higher yields in lower‑quality bonds, default risk and price volatility are primary concerns.

Treasury Inflation-Protected Securities (TIPS) emerged in 1997 to address this problem. If an investor buys a 10-year bond with a 3% yield but inflation hits 5%, the investor loses money. Investors demanded higher rates to protect themselves from that risk, meaning that the Treasury has to pay higher yields, even if inflation then falls. By issuing TIPS, the Treasury shifts inflation risk onto itself, thereby allowing investors to accept a lower baseline interest rate.

Fixed income isn’t just Treasury bonds. It includes traditional bonds, real‑estate‑backed credit, private credit, and other contractual instruments. Think of it as a menu of investments with predictable cash flows. Investors benefit from considering the full menu and choosing options that best align with their objectives, risk tolerance, and overall balance sheet.

Traditional bonds provide liquidity, transparency, daily pricing, and a wide range of durations and credit levels. This category includes government, agency, investment-grade corporate, municipal, and high-yield bonds.

Real-estate-linked income funds include mortgage investments, bridge loans, other real-estate-backed loans, and some REITs. These options offer income backed by real assets, often with some inflation sensitivity, lower liquidity, and deal-specific risk.

Private credit encompasses non-bank lending to businesses, asset-backed finance (such as loans collateralized by equipment or accounts receivable). These funds offer diversification upside but also entail complexity, manager selection, and illiquidity.

Contractual income also includes CDs and certain annuity products, which are typically backed by explicit contracts and, in some cases, guarantees. Structured notes can also provide fixed or formula‑based income, but they introduce additional complexity and issuer risks.

The diversity of options within fixed‑income investments gives investors far greater flexibility to customize their risk profile across interest‑rate, credit, and real‑estate exposures. The right mix can complement the rest of your portfolio, rather than accidentally doubling down on its existing vulnerabilities. In other words, the lesson of the last few years isn’t that fixed income has lost its value as part of a well-crafted portfolio. It’s that the ‘fixed‑income sleeve’ is now a full set of instruments that must be assembled with the same care and intentionality as the equity side of the portfolio.

In future articles, we’ll dive deeper into how we think about each of these building blocks—traditional bonds, real‑estate‑linked income, and private credit—and how they can work together to create a more resilient income engine for high‑net‑worth investors.