Are there actual dates for when accumulating ETFs are updated?
I hold MXWS from Invesco and thought that perhaps any updates might coincide with the date/s distribution ETF receive their dividends.
TIA
Morning 
,
The underlying index (MSCI World index) is being rebalanced quarterly as per the factsheet, see last sentence. All ETF’s tracking a particular index will automatically rebalance each time this has happened.
You can find more information here - Index methodology - MSCI.
The exact dates, subject to change, are here - https://www.msci.com/eqb/pressreleases/archive/ir_dates.pdf
Many, many thanks. 