introduction: The GameStop debacle and the dangers hidden in the two-day wait
the "GameStop short squeeze" that rocked financial markets around the world in January 2021 wasn't just a battle between retail investors and hedge funds. it exposed a fatal flaw in the stock market's then-standard "T+2" settlement system, a structure that allows two days for money and securities to flow back and forth after a trade is executed.
the two days between trade date (T) and settlement (T+2) is the critical window during which market participants are exposed to counterparty default, or 'settlement risk'. when GameStop's stock price spiked unusually high, the U.S. Central Securities Depository (DTCC) required brokers like Robinhood to post astronomical amounts of additional margin (margin calls) to protect against potential losses over the next two days. robinhood was unable to immediately raise the margin, which at the time amounted to about $3.7 billion, and was forced to unilaterally stop buying some stocks, including GameStop, to prevent the system from collapsing.
the event clearly demonstrated that longer settlement cycles can turn market volatility into a system-wide crisis - the "time" it takes to settle proved to be a key variable in determining the magnitude of risk. This traumatic experience was a direct impetus for regulators and market operators around the world to hasten the transition to a "T+1" system, which shortens the settlement cycle to one day.
understanding the settlement cycle: From T+2 to the new standard T+1
to understand the process of stock trading, it's important to distinguish between two dates.
trade Date (T): the day an investor places an order to buy or sell a stock.
settlement Date: The day the trade is finally finalized, with the buyer receiving payment and the seller fully handing over the securities.
as technology has evolved, settlement cycles have steadily shortened. south Korea used to have a 'T+5' system, which was shortened to 'T+2' in 1972, and the US switched from 'T+3' to 'T+2' in 2017. now, 'T+1' is the next step in this modernization trend, meaning that you can buy and sell stocks on Monday (T) and have everything settled on the very next business day, Tuesday (T+1).
T+2 vs. T+1 system comparison
t+2 T+2 (current system) T+1 (new system) definition payment clears 2 business days after the transaction payment clears 1 business day after the trade cash out if you sell on Monday, you can cash out on Wednesday if you sell on Monday, you can cash out starting Tuesday settlement risk exposed to risk for 48 hours reduced risk exposure to 24 hours funds Efficiency relatively low (funds are tied up for an extra day) relatively high (funds turnover speed increases) operational complexity free up time for back-office processing automation required to compress turnaround time foreign investors relative ease of time for currency exchange and fund transfer time zone differences put a huge strain on currency exchange and funding
global Megatrends: Why is the world moving to T+1?
the shift to 'T+1' is not just a matter of one country, it's a global trend that cannot be reversed. in May 2024, the United States, Canada, and Mexico fully adopted T+1, setting a new standard for global capital markets. their move is having a domino effect on markets around the world.
the European Union (EU), the United Kingdom, and Switzerland are working closely together to overhaul their institutions and infrastructure with the goal of a simultaneous transition in October 2027. in Asia, India has led the way, having already completed its T+1 transition, and discussions are underway in major financial hubs such as Hong Kong and Japan.
a key driver of this global harmonization is 'conformity'. if the US, the world's largest market, moves to T+1 while the rest of the world remains on T+2, cross-border transactions will experience inefficiencies and unnecessary costs due to mismatched settlement dates. for example, selling a stock in a T+2 country to buy a stock in a T+1 country creates a one-day funding gap, which is a significant burden for global investors. For a market with a high proportion of foreign investment, such as South Korea, aligning with global standards is not a choice, but a necessity to remain internationally competitive. The adoption of T+1 is a measure of a market's sophistication and efficiency, and countries that lag behind risk being perceived as "second-class markets" that will be at a disadvantage in attracting foreign funds.
key benefits of shorter settlement cycles: increased stability and investor comfort
The T+1 transition has positive effects on two fronts.
macro perspective: Increased financial system stability
shorter payment cycles have the effect of strengthening the "safety valve" of the financial system. first, it reduces credit and market risk. this is because the period during which a counterparty is exposed to the risk of default or sudden price movements is halved. second, it eases clearing fund requirements. with system-wide risk reduced, central clearinghouses like DTCC can reduce the size of the pooled funds they set aside for contingencies. in fact, in the US, NSCC's clearing fund decreased by about 23% after the T+1 transition, leading to greater capital efficiency across the financial sector.
at the micro level: Benefiting retail investors
the most direct benefitto investors is increased liquidity. the ability to receive the proceeds from the sale of their shares a day earlier dramatically improves their turnover of funds. this means you can react more quickly to new investment opportunities. it also makes cross-border investment strategies more efficient, for example, using the funds from selling US stocks to buy Korean stocks the very next day. in addition, the settlement cycle will be aligned with other financial instruments that already operate on T+1, such as government bonds and options, reducing investor confusion and making trading easier.
mountains to climb: The technical and operational challenges of T+1
T+1 isn't all sunshine and rainbows - there are a number of complex technical and institutional challenges that need to be addressed for a successful implementation.
domestic market challenges: the race against time with automation
shortening the settlement cycle by one day doesn't just mean faster cut-off times - it means that all the back-office work, such as trade confirmation, allocation, and ambassadorship, must be done on the same day as the transaction. analysis from Europe shows that the actual time available for business processing can plummet by more than 80% (from 12 hours to 2 hours) instead of 50%. this is simply unacceptable for traditional methods that rely on manual labor, and requires full automation and the implementation of a 'Straight-Through Processing' (STP) system across the entire process.
international Challenges: Foreign Investors' Time Differences
the biggest challenge for the Korean market in adopting T+1 is the issue of foreign investors, especially those from North America or Europe, where the time zones are diametrically opposed, making it physically very difficult for them to exchange currency (FX) and send payment funds within their home business hours after the Korean market closes. failure to obtain KRW within the compressed timeframe can result in settlement failures, which can lead to fines as well as a loss of confidence in the Korean market as a whole. therefore, the success of T+1 implementation will depend on more than just improving domestic infrastructure, but also on the ability of international financial services to come up with innovative foreign exchange trading systems and flexible credit arrangements to minimize inconvenience for foreign investors.
south Korea's T+1 roadmap: current status and outlook
currently, the Korea Exchange (KRX) and the Korea Securities Depository (KSD) have officially started the T+1 transition discussions. a working group of participating institutions, including the Korea Financial Investment Association and a number of securities firms, has been formed to analyze technical and institutional challenges and seek solutions.
there is no specific timeline for implementation yet, and the consensus is that it will take a "significant amount of time". this translates to a cautious approach that prioritizes stability over haste. it is likely that Korean regulators will closely observe the US and European transitions, learn from any issues that may arise, and ensure that they have the perfect solution to foreign investor issues before moving forward. This cautious approach is a strategic choice to minimize disruption during the transition and preserve confidence in the Korean capital markets.
a practical guide for investors: adapting to the T+1 environment
The T+1 era will require some changes to investors' trading habits.
funding your purchases in advance: Stock purchases must be deposited into your account no later than the day after the trade date. The practice of initiating an ACH transfer from your bank after confirmation of a trade can cause delays in settlement, so it's important to get in the habit of funding in advance.
manage your credit (margin) account: The timeframe for posting initial margin on credit (Regulation T) is also reduced by one day. you'll need to react more quickly to margin calls, and if you sell other assets to fund margin, you'll need to manage the settlement date of those assets to align with T+1.
faster time to correct trading errors: You have half the time to correct an erroneous trade or specify a specific tax lot when selling. you'll need to check your orders and terms more carefully on the day of trading.
communication with brokerage firms: Most importantly, reach out to the brokerage firms you trade with to clarify any changes to their internal policies, deadlines for depositing funds, etc. due to the T+1 transition.
conclusion: Toward a safer and more efficient future for the Korean stock market
the transition to the T+1 settlement cycle is a necessary step to reduce systemic risks exposed by GameStop and maintain international competitiveness in line with global standards. while complex challenges remain around attracting foreign investors, this is both a challenge and an opportunity for the Korean financial industry to step up.
a successful T+1 rollout will provide faster capital turnover and convenience for domestic investors, and in turn, increase the credibility and attractiveness of the Korean capital market as a whole. More than just a technological advancement, it will be an important step in building a safer and more efficient financial infrastructure that benefits all market participants.