Sortino Ratio: The Smarter Investment Risk Metric for 2025

For years, investors have relied on the Sharpe Ratio to compare investments and measure risk. But as financial markets become more sophisticated and Australians demand better insights, the Sortino Ratio is taking centre stage. In 2025, this alternative risk metric is gaining traction with everyone from self-directed investors to superannuation fund managers. Here’s why the Sortino Ratio deserves a closer look—and how it can help you make smarter investment decisions this year.

What Is the Sortino Ratio and How Does It Work?

The Sortino Ratio is a risk-adjusted performance metric that improves on the Sharpe Ratio by focusing only on downside volatility—meaning the ‘bad’ volatility that actually matters to investors. While the Sharpe Ratio treats all volatility as equal, the Sortino Ratio ignores upside swings and instead zeroes in on the risk of negative returns.

• Formula: (Portfolio Return – Risk-Free Rate) / Downside Deviation
• Downside Deviation: Measures only the variation of returns that fall below a target or required rate, usually zero or the risk-free rate.

For example, if your portfolio has been delivering steady gains but with the occasional sharp drop, the Sortino Ratio will penalise those drops more than the Sharpe Ratio. This gives you a clearer picture of how much ‘bad risk’ you’re actually taking on for each unit of return.

Why the Sortino Ratio Matters More in 2025

The investment landscape in Australia is shifting. With the Reserve Bank of Australia keeping rates in flux and global markets showing heightened volatility, traditional risk measures can be misleading. Here’s why the Sortino Ratio is particularly relevant now:

• Focus on Downside Risk: Australian investors are increasingly wary of drawdowns, especially after recent market corrections. The Sortino Ratio directly addresses this fear.
• Rise of Alternative Assets: Property funds, infrastructure, and private equity are all part of more diversified portfolios. These assets often have asymmetric risk profiles, making downside-focused metrics more useful.
• Regulatory Changes: APRA has signalled greater scrutiny on risk management in super funds. With the Your Future, Your Super reforms and ongoing transparency requirements, fund managers are seeking more nuanced risk tools in 2025.

For example, an Australian equities fund that delivered a 10% annual return but suffered two sharp monthly losses would show a much lower Sortino Ratio than a fund with steadier gains—even if their Sharpe Ratios were similar. That’s a crucial distinction for investors prioritising capital preservation.

How to Use the Sortino Ratio in Your Investment Analysis

The Sortino Ratio isn’t just for fund managers. Everyday investors and SMSF trustees can use it to cut through the noise and find investments that truly align with their risk tolerance. Here’s how you can put the Sortino Ratio to work:

1. Compare Funds: When choosing between two managed funds, look beyond the Sharpe Ratio and check the Sortino. A higher Sortino Ratio suggests better compensation for downside risk.
2. Assess Portfolios: Review your own portfolio’s Sortino Ratio, especially if you’ve experienced losses during market downturns. It can highlight where you’re taking on more risk than you realised.
3. Screen for Consistency: Use the Sortino Ratio as a filter when researching ETFs, LICs, or super options. Many research platforms and fund reports now include this metric as standard in 2025.

Tip: When reviewing a fund’s fact sheet, look for the Sortino Ratio over a 3- or 5-year period for a more reliable read. In 2025, many leading platforms like Morningstar and Stockspot now display this figure alongside other key ratios.

Limitations and Best Practices

While the Sortino Ratio offers a sharper view on risk, it’s not a silver bullet. It relies on the choice of a target return (usually zero or the risk-free rate), and like all metrics, it should be considered alongside other factors such as fees, liquidity, and diversification. Market conditions, especially in turbulent periods, can also skew results over short time frames.

In 2025, financial advisers recommend using the Sortino Ratio as part of a toolkit—complemented by qualitative assessments, stress-testing, and scenario analysis. This is especially important as more Australians seek to take control of their investments through SMSFs and direct brokerage accounts.