what is the best returning index fund from june 16 2013 to june 30 2013

DUST had the highest return between June 16, 2013 and June 30, 2013 by a major index or ETF, returning 37.2%.

ASSET DATE % RETURN
DUST
6/16/2013 - 6/30/2013
37.25%
GLL
6/16/2013 - 6/30/2013
23.94%
ZSL
6/16/2013 - 6/30/2013
20.44%
KOLD
6/16/2013 - 6/30/2013
14.37%
BZQ
6/16/2013 - 6/30/2013
12.56%
EPV
6/16/2013 - 6/30/2013
11.26%
SMN
6/16/2013 - 6/30/2013
10.93%
TMV
6/16/2013 - 6/30/2013
9.55%
TTT
6/16/2013 - 6/30/2013
9.39%
YCS
6/16/2013 - 6/30/2013
9.2%
TYO
6/16/2013 - 6/30/2013
8.62%
CN
6/16/2013 - 6/30/2013
8.33%
TECS
6/16/2013 - 6/30/2013
7.95%
EFU
6/16/2013 - 6/30/2013
7.51%
REW
6/16/2013 - 6/30/2013
6.98%
TBT
6/16/2013 - 6/30/2013
6.41%
ERY
6/16/2013 - 6/30/2013
5.97%
SPXU
6/16/2013 - 6/30/2013
5.91%
PST
6/16/2013 - 6/30/2013
5.69%
SPXS
6/16/2013 - 6/30/2013
5.6%
SDOW
6/16/2013 - 6/30/2013
5.52%
SQQQ
6/16/2013 - 6/30/2013
5.5%
DBJP
6/16/2013 - 6/30/2013
5.34%
EUO
6/16/2013 - 6/30/2013
5.12%
FXP
6/16/2013 - 6/30/2013
5.11%