Why Is South Korea Targeting API-Based Trading?
South Korea’s Financial Supervisory Service said API-driven trading now accounts for about 30% of crypto buy-and-sell turnover, raising concerns over the growing role of automation in market activity. The regulator warned that some traders are using automated tools to inflate volumes and distort prices, prompting plans for targeted investigations.
Authorities pointed to patterns such as repeated small trades, spoofed orders, and coordinated activity across multiple accounts. These practices are designed to create the appearance of liquidity or directional momentum, potentially drawing in retail investors before positions are unwound.
The Financial Supervisory Service said it will focus on accounts exhibiting excessive or abnormal trading behavior, marking a shift toward closer surveillance of algorithmic strategies in crypto markets.
What Manipulation Tactics Did the Regulator Identify?
The regulator outlined several methods used to influence prices. One approach involves placing repeated small market buy and sell orders to simulate active trading and generate artificial volume. Another tactic uses higher-priced limit orders to push prices upward, creating a false sense of demand.
In one case, a trader used API-driven orders ranging from 5,000 won (about $3) to 10,000 won (about $6) to mimic market activity before selling into rising prices as retail participation increased. In another example, a trader repeatedly submitted higher-priced buy orders to move the market toward a predetermined target level.
These strategies rely on speed and automation, making them difficult to detect in real time without enhanced monitoring tools. The Financial Supervisory Service also warned against the widespread use of publicly shared high-frequency trading code, which can amplify these behaviors across multiple participants.
Investor Takeaway
How Does This Fit Into South Korea’s Broader Enforcement Push?
The warning is part of a wider effort by South Korean regulators to tighten oversight of crypto markets following a series of operational and fraud-related incidents. Authorities have increased scrutiny of exchange practices while addressing gaps in trading controls and risk management.
On April 7, regulators ordered exchanges to reconcile internal ledgers with actual asset holdings every five minutes after identifying delays in balance checks and weaknesses in trade-halting mechanisms. The move aims to reduce operational risk and improve transparency in real-time market conditions.
Efforts have also focused on fraud prevention. On April 8, the Financial Services Commission said inconsistent rules around withdrawal-delay exemptions allowed bad actors to move funds quickly, with exempted accounts linked to a majority of voice phishing losses.
Investor Takeaway
What Regulatory Constraints Still Exist?
Despite increased enforcement, legal uncertainty continues to limit regulatory action. On April 9, a South Korean court overturned a partial suspension of Upbit operator Dunamu, citing unclear rules and highlighting ongoing gaps in the legal framework governing digital assets.
This tension between enforcement and incomplete regulation reflects the current stage of crypto oversight in South Korea. While authorities are moving quickly to address market risks, the absence of fully defined rules complicates consistent application and enforcement.
That said , the combination of tighter surveillance and legal ambiguity creates a complex environment for market participants where compliance expectations are rising, but regulatory boundaries are still being tested.
