What is Standard Deviation in Mutual Funds? A Simple Guide
Standard deviation measures how much a fund's returns vary around their average. A higher standard deviation means more volatile, unpredictable returns; a lower one means steadier returns. It is a core measure of a fund's total risk.
Standard deviation sounds technical, but the idea is simple: it measures how bumpy a fund's returns are. Steady or wild, this number tells you.
We will cover the idea, an example, and the practical takeaways. You can explore mutual funds on Stockk.
Key Takeaways
- Standard deviation measures how much returns vary.
- Higher means more volatile returns.
- Lower means steadier returns.
- It captures a fund's total risk.
- It is best compared within a category.
What does standard deviation tell you?
Standard deviation shows how far a fund's returns tend to stray from their average. A fund with low standard deviation delivers returns close to its average consistently, while a high standard deviation means returns swing widely. It captures the fund's overall volatility, not just market-related risk.
Suppose two funds both average 10% returns. One ranges narrowly around 10%, the other swings from minus 5% to 25%. The second has a much higher standard deviation, meaning a bumpier, less predictable ride.
How to read standard deviation
| Standard deviation | Meaning |
|---|---|
| Low | Steadier, more predictable returns |
| High | More volatile, less predictable returns |
| Compare within category | Most meaningful |
How it relates to other measures
- Total risk: it captures all volatility, not just market risk
- Feeds Sharpe: it is the risk part of the Sharpe ratio
- Beta differs: beta is market-relative; this is absolute
- Category matters: equity funds naturally vary more than debt
How investors use standard deviation
Standard deviation helps you gauge how comfortable you will be holding a fund. A high value warns of a bumpy ride, which may be fine for a long horizon but stressful for a short one. Compare it within a category, since equity funds naturally have higher standard deviation than debt funds.
Ready to start? You can explore mutual funds on Stockk, with Indira Securities as your SEBI-registered partner. Opening a free account takes minutes, and the Knowledge Center has more guides on fund performance.
Mutual fund investments are subject to market risks. Read all scheme related documents carefully. Past performance is not a guarantee of future returns, and this article is for learning only, not investment advice.
Frequently Asked Questions
What does standard deviation measure in a fund?
It measures how much a fund's returns vary around their average, capturing total volatility. Higher means bumpier, lower means steadier returns.
Is a high standard deviation bad?
It means more volatility and less predictability, which can be fine for a long horizon but stressful for short-term needs. It signals risk, not necessarily poor quality.
How is standard deviation different from beta?
Standard deviation measures a fund's absolute volatility, while beta measures its movement relative to the market. One is absolute, the other relative.
Why compare standard deviation within a category?
Because equity funds naturally vary more than debt funds, comparing across categories misleads. Within a category, it is a fair risk gauge.
How do I use standard deviation?
Gauge whether a fund's volatility suits your horizon and comfort.
Investments in securities market are subject to market risks. This article is for educational purposes only and does not constitute investment advice.
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