Polymarket and Kalshi have taken steps to squash some types of insider trading as the prediction market platforms have come under increasing scrutiny for suspected manipulation.
Polymarket updated its rules on Monday to clarify that certain kinds of bets are prohibited: users cannot act on stolen confidential information, wager using illegal tips, or bet if they are in a position to influence the outcome of an event.
The changes affect Polymarket’s offshore venue, where the bulk of its trading occurs, and its fledgling US-regulated exchange. Both platforms debuted market integrity pages on Monday, providing users with information on how the ...
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