If you had invested $1000 in an index ETF every Friday (or last trading day of the week) at the closing price in 2016, how would you have done? Listed at the bottom is a list of the same ETFs with a single investement at the closing price on the last trading day of 2016.
Excludes dividends and trading costs.
A lump sum early would have easily outperformed dollar cost averaging in 2017! 2017 was a year where we really didn't see any market corrections, so trying to buy periodically failed the lump sum at the beginning of the year.