South Korean regulators are reconsidering how they treat crypto market makers after a yen-pegged stablecoin traded at roughly four times its target price on a domestic exchange this month. The token, JPYC, spiked on Upbit, and the move has put a spotlight on a rulebook that effectively bars professional market making in the country.
Under current manipulation rules, the kind of two-sided quoting that keeps prices tethered to an underlying asset is heavily restricted. That leaves thin order books, and when a small-cap or niche token draws sudden demand, there's often nobody on the other side to sell into the rally.
Why a yen stablecoin moved so hard
JPYC is designed to track the yen. On Upbit this month, it didn't come close. A fourfold premium on a stablecoin is the kind of print that usually means one of two things: a broken redemption path or a market with no arbitrageurs willing to step in.
South Korea's rules make the second problem worse. Market makers normally earn their keep by quoting both bids and offers, profiting from the spread while smoothing out violent moves. If that activity runs afoul of manipulation statutes, the desks stay away. The result is what traders saw with JPYC — a price that reflects whatever the most eager buyer is willing to pay, not what the asset is worth.
The rule that made market making scarce
The restriction isn't new. It grew out of a broader crackdown on wash trading and price pumping, and on paper it's aimed at bad actors. In practice, it has pushed legitimate liquidity providers to the sidelines or offshore.
That creates a familiar bind for regulators. Loosen the rules and you risk reopening the door to the exact behavior they were written to stop. Keep them and you get more episodes like the JPYC spike, where a token's price detaches from its peg and ordinary users are left holding the bag.
Officials haven't said what a revised approach would look like, or whether it would carve out an exemption for registered market makers. The review is still at the discussion stage.
What the review could touch
Any rethink would have to draw a line between market making and manipulation, which sounds simpler than it is. A market maker quoting tight prices all day looks, in raw order-book data, a lot like someone placing and canceling orders to create a false impression of demand.
The distinction usually comes down to intent and consistency — whether the quotes are two-sided, whether they're held for meaningful periods, and whether the desk is actually filling trades. Writing that into South Korean statute without handing bad actors a loophole is the hard part.
There's also the question of who would qualify. A domestic licensing regime for liquidity providers would need capital rules, reporting requirements, and some way to police firms that also trade for their own book.
What happens next
The JPYC episode is the immediate trigger for the review, but it isn't the first time thin liquidity has produced a wild print on a South Korean exchange. Regulators are expected to keep gathering feedback before proposing any concrete changes, and no timeline has been set.
Until then, the status quo holds: market makers stay on the sidelines, and any token that draws a sudden bid on a Korean exchange can still trade at whatever the thinnest book will bear. The next test will be whether another peg break forces the issue faster than the review can move.
