"iShares MSCI ACWI UCITS ETF USD (Acc)" is an exchange-traded investment fund (ETF). It refers to the MSCI All Country World Index. This index reflects the development of 2974 world wide stocks and is therefore very well diversified. The ETF replicates its index using physical replication with sampling, so it contains the most important securities of its reference index. The ETF's earnings (dividends) are automatically reinvested (accumulated). The fund company iShares claims a total expense ratio (TER) of 0.20% per year. The yearly average divergence from the index performance (Tracking Difference) since 2012 was 0.29% per year. Therefore, the ETF was more expensive than the TER suggests.
Comparing Tracking Difference, Total Expense Ratio and fund size
Every bubble represents an ETF. The further to the right it is, the higher (worse) is its tracking difference. The further up it is, the higher the total expense ratio specified by the fund company. The bubble's area represents the fund volume.