With the spread between the 2 tickers at 5 points; each getting the same dividend; and the only difference being voting v. non voting; why would anybody ever buy tds over tdss? Perhaps the best trade is to short TDS and go long TDSS?? Eventually the spread has to come in by several points.
FYI the spread is out to 5.75 points! It is time to either buy tdss outright; or buy tdss v. a short of tds. You win as spread compresses over time; plus it is a homerun in case of a buyout as spread would then collapse to zero.