The best Size-Factor ETFs

How to invest in size-factor ETFs

0.23% p.a. - 0.45% p.a.
annual total expense ratio (TER) of size-factor ETFs
on the size factor, which are tracked by ETFs
on the size factor
The best indices for size-factor ETFs

How do I invest in the size factor?

Statistical observations show that small companies (small caps) have tended to outperform large ones (large caps) in certain economic periods in the past. This research-based observation is referred to as the size factor. The only measure for the size that is used in this context is a firm's market capitalisation, i.e. the product of tradable shares and market value. Other indicators such as the number of employees or sales are not taken into account.

This factor strategy can also be implemented by means of an index. In this investment guide, you will find all available worldwide small-cap ETFs. Currently, there are 4 ETFs available. You may also have a look at our investment guides on Small Caps Europe and Small Caps USA.

MSCI World Small Cap performance

1 month: -9.01%
1 year: 5.56%
3 years: 41.13%
5 years: 47.43%

Size-factor ETFs in comparison

The most important factors at a glance

When choosing a size-factor ETF one should consider several other factors in addition to the methodology of the underlying index and performance of an ETF. For better comparison, you will find a list of all size-factor ETFs with details on size, cost, age, income, domicile and replication method ranked by fund size.

Compare all size-factor ETFs in detail
Compare all size-factor ETFs in a chart

  Fund size
in m EUR
in %
Use of profits Fund domicile Replication method
iShares MSCI World Small Cap UCITS ETFIE00BF4RFH31 2,150 0.35% p.a. Accumulating Ireland Optimized sampling
SPDR MSCI World Small Cap UCITS ETFIE00BCBJG560 730 0.45% p.a. Accumulating Ireland Optimized sampling
UBS ETF (IE) MSCI World Small Cap Socially Responsible UCITS ETF (USD) A-accIE00BKSCBX74 52 0.23% p.a. Accumulating Ireland Full replication
iShares MSCI World Small Cap ESG Enhanced UCITS ETF USD (Acc)IE000T9EOCL3 25 0.35% p.a. Accumulating Ireland Optimized sampling

Source:; As of 24.01.22


Return comparison of all size-factor ETFs

The table shows the returns of all size-factor ETFs in comparison. All return figures are including dividends as of month end. Besides the return the reference date on which you conduct the comparison is important. In order to find the best ETFs, you can also perform a chart comparison.

Source:; As of 31.12.21; Calculations in EUR including dividends