One possible explanation is that we require this of our vendors and suppliers, and the easiest way to achieve that is by making it reciprocal.
The actual policy wording:
> No Third-Party Trading or Tipping. Do not trade in the securities of another company when aware of material nonpublic information about that company in connection with your work at ******. This includes trading in the stock of ****** suppliers, manufacturers, vendors, or customers, such as cellular network carriers or other channel partners. You must also not tip material nonpublic information about another company.
The actual policy wording:
> No Third-Party Trading or Tipping. Do not trade in the securities of another company when aware of material nonpublic information about that company in connection with your work at ******. This includes trading in the stock of ****** suppliers, manufacturers, vendors, or customers, such as cellular network carriers or other channel partners. You must also not tip material nonpublic information about another company.