In June of 2001 TSM paid a 40% dividend distribution on their US listed shares (aka ADR's). Existing options contracts were adjusted to reflect the 40% distribution. You will see two symbols for most contracts:
One symbol is for the delivery of 140 shares (adjusted contract) One symbol is for the delivery of 100 shares (standard contract)
You can tell which is which by the prices (should be obvious). To avoid confusion I recommend you stick with the lower priced of the 2 calls listed so you know you will be getting 100 shares if exercised (a year from now you may be calculating 100 shares per contract while exercising your calls on 140 shares per contract only to find you don't have the money!).
I do appreciate the reply. But, given the date you cite (June 01), any options, even the leaps, are long expired. Clearly, these current odd symbols are the result of newer stock dividends. Inthe past, for other stocks, the board members were readily familiar with the new terms. If I get hold of my broker, I'll update. JOE