An option on birthdaysAs Chicago Board Options Exchange celebrated its 30th anniversary last week with a degree of fanfare (well, OK, the ringing of the opening bell by Mayor Daley), another anniversary passed by with rather less attention. For last week saw the 25th anniversary of the start of equity options trading in the UK. London Traded Options Market (LTOM) began trading at London Stock Exchange on 21st April 1978 and a gang of the faithful gathered a City watering...