what is the best returning index in may 2018

The Nasdaq Composite (IXIC) had the highest return in May 2018 by a major index, returning 5.5%.

ASSET MONTH % RETURN
the Nasdaq Composite (IXIC)
May 2018
5.51%
the S&P 500 (GSPC)
May 2018
2.36%
the Dow Jones Industrial Average (DJI)
May 2018
1.24%