what is the best returning index since 2006

The Nasdaq Composite (IXIC) has had the highest return since 2006 by a major index, returning 711.1%.

ASSET % RETURN
the Nasdaq Composite (IXIC)
711.08%
the S&P 500 (GSPC)
355.56%
the Dow Jones Industrial Average (DJI)
285.48%