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 308.3%.

ASSET % RETURN
the Dow Jones Industrial Average (DJI)
308.34%
the S&P 500 (GSPC)
439.62%
the Nasdaq Composite (IXIC)
755.6%