July 2 (Reuters) - OpenAI said on Wednesday it has not

partnered with Robinhood for the stock tokens the

trading platform unveiled earlier this week.

Robinhood said on Monday it had launched tokens that would

allow its customers in the European Union to get exposure to

OpenAI and SpaceX.

"We did not partner with Robinhood, were not involved in

this, and do not endorse it," OpenAI said.

The issue highlights a key challenge with tokens linked to

private company stock. Privately held startups often have a

so-called "right of first refusal", which gives them the first

opportunity to buy back their shares before the owner can sell

them to an outside party.

Robinhood and SpaceX did not immediately respond to Reuters

requests for comment.

(Reporting by Niket Nishant in Bengaluru; Editing by Alan

Barona and Shinjini Ganguli)