what is the worst returning index since 2010

The Dow Jones Industrial Average (DJI) has had the lowest return since 2010 by a major index, returning 331%.

ASSET % RETURN
the Dow Jones Industrial Average (DJI)
331.01%
the S&P 500 (GSPC)
477.65%
the Nasdaq Composite (IXIC)
842.42%