Like I said its a stretch. When I get the time I'll take a look at FNMA allowed networth amts starting in 2013 and the call dates of all FNMA prefs. See if any remote correlations can be drawn.
Tender offer would be nice.
I bought Ford prefs (ticker KVU) in the depths of 2009 (w/luxury of hindsight...wish I would have bought alot more). I picked them up btwn $2-3 per share. Ford made a tender offer at 50% FV($12.50).
I think a tender on GSEs would be in the 60-80% FV range (higher than Ford).