Editor’s note: This is general educational information about how Singapore’s securities settlement machinery works. It is not advice, and it concerns no particular company or security. The description below is taken from the official rulebooks and regulations listed at the end.
Analysis: what a same-day trigger buys, and what it costs
The design choice worth isolating is timing. Singapore starts buying in on the intended settlement day. The European Union, in Regulation (EU) No 909/2014, took the opposite view: its recitals state that in most cases a buy-in process should be initiated where the instruments are not delivered within four business days of the intended settlement date, extending to a maximum of seven business days for illiquid instruments, and Article 7 requires central securities depositories to run a penalty mechanism as an effective deterrent for participants that cause fails. The same regulation sets the intended settlement date for trading venue transactions at no later than the second business day after trading.
Those are two different theories of the same problem. A grace period of several days lets a failing participant borrow or source stock without the market learning anything, which protects liquidity in thinly traded names but leaves the buyer waiting. Singapore’s rules keep the wait short and push the search into a visible session with a published list of affected counters. The trade-off is that a same-day, price-escalating bid in an illiquid stock can run up a large cost, and the rules leave the escalation discretionary rather than automatic and give CDP the power to suspend buying-in in a particular security.
The escalation formula is the part a careful reader should sit with. Because the opening bid is anchored 2 minimum bids above the highest of four reference prices, and because CDP may keep adding 2 minimum bids until the shares appear, the cost of a fail is unbounded in principle and borne entirely by the party that caused it. That is the deterrent, and the fine schedule is secondary to it. The five-settlement-day cash settlement backstop then caps how long an obligation can stay open, which matters more for the buyer than the size of any penalty.
What the rulebook does not establish is how often any of this is used. The rules describe capability, not frequency, and CDP’s power to buy in is discretionary at every stage. A reader wanting to know whether Singapore settlement is tight would need the fail statistics rather than the rulebook, and those are not published in the rulebook itself. What the text does establish is that a Singapore buyer’s entitlement never depends on the seller: it depends on a novated contract with the clearing house, a mandatory recalculated bid, and a dated deadline after which cash replaces shares.
What the documents say
Most people who buy shares on the Singapore Exchange never learn whether the person on the other side actually had them. The shares arrive, the cash leaves, and the transaction closes. Behind that reliability sits a rulebook chapter with its own market session, its own pricing formula and its own fine schedule, built for the days when a seller does not deliver. Singapore calls it the buying-in market, and the mechanics are unusually explicit compared with the discretionary arrangements used in many jurisdictions.
The obligation that can be broken
Under the SGX-ST Rules, a trade in the ready market for securities other than wholesale corporate bonds settles on T+2, where T is the date the trade is executed. The unit share market settles on the same basis. Trades in the market for wholesale corporate bonds also settle T+2 but are not eligible for clearing by The Central Depository. Where the settlement day falls on a holiday for the foreign currency in which a trade settles, the intended settlement day rolls to the next common banking day, meaning a day on which both Singapore banks and the relevant currency transfer clearing system designated by CDP are open.
The delivery duty falls on the clearing member, not on the investor. Rule 6.5.2A of the CDP Clearing Rules requires a clearing member to make the securities available in the manner and by the time set out in the CDP Settlement Rules so that delivery can occur on the settlement day the obligation is due. A member that misses that deadline becomes, in the rulebook’s own term, a short clearing member, and everything in Rule 6.7 follows from that status.
What CDP is permitted to do on the day
CDP has discretion, not an obligation, to start buying in. Where it does, the buy-in commences on the intended settlement day of the novated contract itself, without prior notice to the failing member, and CDP need not wait. That is a sharper trigger than the design many markets adopted. The costs are paid by the short clearing member.
The session is scheduled and announced. CDP fixes a commencement time and tells clearing members by circular, must give at least 3 working days notice before changing that time, and on the day itself publishes the list of securities going into buying-in through the SGX website or another medium it considers appropriate. If an emergency makes the scheduled start unlikely, CDP notifies members that buying-in will not begin on time and, once it can be determined, the estimated start; a delayed session may only open at least 15 minutes after the original time.
Pricing is formulaic and deliberately generous to sellers. The buying-in bid is set at 2 minimum bids above the highest of four reference points: the previous day’s closing price, the reference transacted price, the reference bid price, and, where a buying-in market trade on the previous market day itself failed to deliver, that trade’s transacted price. The reference transacted and bid prices are drawn from the last transacted prices and bid prices within the 1 hour preceding commencement. CDP may adjust any of those inputs for corporate actions. If the stock does not come out at that level, CDP has absolute discretion to raise the bid by a further 2 minimum bids, repeatedly, throughout the session. Trades struck in the buying-in market settle on T+1 rather than T+2.
An unfilled session rolls over. Unless the securities are withdrawn from buying-in or the short member makes them available by the time CDP specifies on the following market day, the exercise continues the next market day with the bid recalculated from the same formula. If the shares are still not obtained by the second day scheduled for buying-in, the obligation shifts back to the member, which must procure the securities itself, on the ready market or otherwise. Buying-in commission, at a rate CDP advises from time to time, is charged to the short member.
Buying-in stops where the market stops. It does not apply while SGX-ST has suspended trading in a security, and it does not apply during a trading halt, in which case CDP may either start once trading resumes or direct the member to procure the shares within a stipulated time. CDP may also suspend buying-in in a security indefinitely when circumstances make that desirable.
The backstop and the penalties
If a delivery obligation is still outstanding on the fifth Settlement Day after the intended settlement day, or such other number of settlement days as CDP specifies, CDP cash settles the obligation on the next settlement day. The rule was added on 10 December 2018 and amended on 6 September 2021. CDP separately reserves the right to vary or dispense with any of the timelines in Rule 6.7, and to cash settle even where no buying-in or procurement has been attempted.
Fines run alongside the process rather than instead of it. A member that fails to deliver when due may be fined $1,000 or 5% of the contract value of the undelivered securities, whichever is higher. Where the undelivered securities were themselves meant to settle a trade on the buying-in market, the figure rises to $5,000 or 10% of contract value, whichever is higher. A further penalty of $5,000 may be imposed if the obligation is still outstanding on the fifth settlement day after delivery was due. CDP may waive the fine for market makers of cross-listed exchange traded funds and for other classes of participant it deems appropriate. Repeated failures, failure to procure as directed, or failure to deliver into the buying-in market itself can each be referred to the Disciplinary Committee.
