I own the PFF and it has morphed into the PGF. The preferreds of FCX and BMY use to be in the PFF till they were converted; now that ETF is practically all financials.
Don't know anything about these two but am familiar with many of the components (BAC, USB, ING, JPM, WFC, C, etc.). Many were good for trading if that's your inclination. Other than RBS pfds, they're all fairly dead now... and even RBS is deadening out. During the credit crunch they were often in play, sometimes in rotation. Some tend to flare up just before/after quarterly EAs of the parent stock as well as before Fed meetings and monthly unemployment releases. Yields on many were outta sight earlier this year. Complacency is settling back in.