The list below includes all the US Preferred equity ETFs listed in US.
:-) : Liquid-Popular ETFs

Number of US ETFs: 8


Name of ETF

Info Page

EPRF Elkhorn S&P High Quality Preferred ETF info
PFF iShares U.S. Preferred Stock ETF  :-)  info
PFFD Global X U.S. Preferred ETF info
PFXF Market Vectors Preferred Securities ex Financials ETF info
PGF PowerShares Financial Preferred Portfolio  :-)  info
PGX PowerShares Preferred Portfolio  :-)  info
PSK SPDR Wells Fargo Preferred Stock ETF info
VRP PowerShares Variable Rate Preferred Portfolio info