what is the best returning index since 2014

The Nasdaq Composite (IXIC) has had the highest return since 2014 by a major index, returning 421.6%.

ASSET % RETURN
the Nasdaq Composite (IXIC)
421.64%
the S&P 500 (GSPC)
251.14%
the Dow Jones Industrial Average (DJI)
173.96%