How Tracking error works
It is usually the standard deviation of periodic active returns. A low figure indicates the gap was relatively consistent, but it does not say whether the fund lagged by a little or a lot on average.
The figure should always be read with its measurement period, product type and source. A precise-looking number can still answer the wrong question when two unlike products or time periods are compared.
An example
Two index funds may have the same average lag, while the one with steadier monthly gaps has lower tracking error.
Why it matters for your family
Use it with tracking difference, expense ratio, liquidity and replication method rather than treating the smallest single statistic as automatically best.
Connect the figure to a dated goal before acting. Money for an emergency or near-term payment has different constraints from retirement money, even when the product description quotes the same statistic.
Questions people ask
- What does Tracking error mean?
- Tracking error measures how variable an index fund's return difference from its benchmark has been.
- Why does Tracking error matter for a family?
- Use it with tracking difference, expense ratio, liquidity and replication method rather than treating the smallest single statistic as automatically best.
- Does a good Tracking error figure guarantee a result?
- No. It is a measurement of past or assumed conditions. Its meaning depends on the period, data and products being compared, and it cannot guarantee a future outcome.
- Where can I verify information about Tracking error?
- Start with SEBI Investor, linked on this page, and the current official document for the product or tax year involved.