"Invesco STOXX Europe 600 Optimised Oil & Gas UCITS ETF Acc" is an exchange-traded investment fund (ETF). It refers to the STOXX Europe 600 Optimised Oil & Gas Index. This index reflects the development of European stocks . The ETF replicates its index using synthetic replication, so the index performance is realized using a swap contract. The ETF's earnings (dividends) are automatically reinvested (accumulated). The fund company Invesco claims a total expense ratio (TER) of 0.30% per year. The yearly average divergence from the index performance (Tracking Difference) since 2010 was 0.29% per year. Therefore, the ETF was slightly less expensive than the TER suggests.