Shortable ETFs and Leveraged ETFs

Usually ETFs can be shorted, but I found that many Leveraged ETFs do not allow to be shorted, so in order to prepare for trading, I compile a list of Leveraged ETFs that allow shorting:
Sector Select Financial (XLF)
ProShares Ultra S&P (2x S&P) SSO (last dividend 8c per share paid on June 22nd)
ProShares UltraShort S&P (2x S&P Inversed) SDS
Direxion Daily Financial Bull 3x Shares (FAS) (last dividend 10c per share paid on March 23rd)

Here is a list of Leveraged ETFs that do not allow being short:
ProShares Ultra Nasdaq (2x NASDAQ) QLD
ProShares Ultra Financials (UYG)