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 342.3%.

ASSET% RETURN
the Dow Jones Industrial Average (DJI)
342.31%
the S&P 500 (GSPC)
487.19%
the Nasdaq Composite (IXIC)
848.47%