Very simple.
Some of the ETFs gain 2% if the underlying index is down 1%.
QID
SDS
MZZ
DXP
http://www.marketwatch.com/News/Sto...83DA-329B-4E77-AE86-DB4B5B60EA91}&siteid=mktw
Some of the ETFs gain 2% if the underlying index is down 1%.
QID
SDS
MZZ
DXP
http://www.marketwatch.com/News/Sto...83DA-329B-4E77-AE86-DB4B5B60EA91}&siteid=mktw