what is the best returning index fund from july 1 2013 to july 15 2013

TNA had the highest return between July 1, 2013 and July 15, 2013 by a major index or ETF, returning 20.5%.

ASSET DATE % RETURN
TNA
7/1/2013 - 7/15/2013
20.5%
URTY
7/1/2013 - 7/15/2013
20.35%
SVXY
7/1/2013 - 7/15/2013
19.5%
BIB
7/1/2013 - 7/15/2013
18.35%
EGPT
7/1/2013 - 7/15/2013
17.82%
UCO
7/1/2013 - 7/15/2013
17.71%
LTL
7/1/2013 - 7/15/2013
16.41%
UMDD
7/1/2013 - 7/15/2013
16.3%
TQQQ
7/1/2013 - 7/15/2013
16.15%
MIDU
7/1/2013 - 7/15/2013
15.82%
TAN
7/1/2013 - 7/15/2013
15.22%
RETL
7/1/2013 - 7/15/2013
14.86%
YINN
7/1/2013 - 7/15/2013
14.64%
UPRO
7/1/2013 - 7/15/2013
13.3%
UWM
7/1/2013 - 7/15/2013
13.29%
CURE
7/1/2013 - 7/15/2013
13.22%
SPXL
7/1/2013 - 7/15/2013
13.15%
UGA
7/1/2013 - 7/15/2013
13.15%
SOXL
7/1/2013 - 7/15/2013
13.1%
FAS
7/1/2013 - 7/15/2013
13.06%
ERX
7/1/2013 - 7/15/2013
11.98%
XBI
7/1/2013 - 7/15/2013
11.92%
EZJ
7/1/2013 - 7/15/2013
11.07%
PBE
7/1/2013 - 7/15/2013
10.95%
TECL
7/1/2013 - 7/15/2013
10.84%