What is a target-date fund?

A target-date fund — sometimes called a lifecycle fund — is a diversified mutual fund designed to simplify retirement investing. You pick the fund whose target year matches your approximate retirement date (e.g., a 'Target 2050 Fund' if you plan to retire around 2050), and the fund automatically manages the asset mix over time. The SEC's Investor.gov has a detailed guide to target-date funds covering how they work and what to watch out for.

The glide path: how the fund's mix changes over time

Early in the fund's life (far from the target year), the portfolio is heavily weighted toward equities — which carry higher risk but higher expected growth. As the target year approaches, the fund automatically shifts toward more conservative assets like bonds and short-term fixed income. This automatic shift is called the glide path. After the target year arrives, some funds continue shifting ('through' glide paths) while others stop ('to' glide paths). The SEC notes that glide paths vary significantly across fund families — a 2050 fund at one company may be more aggressive or conservative than a 2050 fund at another.

• The year in the name is the target retirement year — not a maturity date or guarantee.
• Asset allocation shifts automatically: stocks-heavy early → bonds-heavy near and after the target year.
• Glide paths vary by fund company — a '2045' fund at one firm is not identical to one at another.
• 'Through' funds continue adjusting past the retirement date; 'to' funds stop at the target year.
• Target-date funds are commonly the default investment option in many employer 401(k) plans.

What to check before choosing a target-date fund

Expense ratio: Target-date funds charge annual fees expressed as an expense ratio (percent of your balance per year). These vary widely — from under 0.10% at major low-cost fund families to 0.50%+. A seemingly small difference in fees compounds significantly over decades. Underlying funds: Many target-date funds are 'funds of funds' that hold other mutual funds inside them, which can add a layer of cost. Check whether the fund's underlying holdings align with your risk tolerance. The SEC warns that target-date funds are not guaranteed to provide enough income for retirement — the target year is a rough guide, not a promise.