The 4 biggest television networks are CBS, Fox, ABC, and NBC. CBS trades on the on the NYSE by the ticker symbol of 'CBS'. Fox is owned by News Corp. and goes by the ticker symbol of 'NWS'. ABC television is owned by Disney and it has a ticker symbol of 'DIS'. Finally NBC is owned by General Electric, and it has a ticker symbol of 'GE'. One company that makes TVs you could buy stock in is sony. You can also buy stock in RCA victor electronics and tvs.