IVZO - Options, page-514

They don't expire for a long time so I can't see that impacting share price to much. Even if they were expiring soon, that would mean they are less attractive and the head would be more attractive, increasing demand and the SP. The fact that they are listed has and will impact the SP though as they are another instrument to get exposure to success. For example, I have been buying the options not the heads which (on a very small scale) means less demand for the heads that there would have been if I could buy the options and could only buy the heads. All inconsequential really in terms of the binary outcome we face at the moment.