STI ends volatile week at 5,689 as SATS slides and banks dominate trading
Market overview and STI ETF performance
The Straits Times Index finished the trading week at 5,689.00, after a Friday session that added 17.00 points, or 0.30 per cent, to close above the previous close of 5,672.00, according to the data. The bounce on 21 August, however, did not offset the weakness that marked the preceding sessions. Across the five trading days from 17 to 21 August, the index declined 1.37 per cent, from 5,768.00 at the start of the period to 5,689.00 at the close. The index's 52-week range stands at 4,216.00 to 5,774.00, which places Friday's close nearer the upper end of that band than the lower.
Friday's breadth was firmly positive. The data records 20 advancing constituents, five declining and five unchanged, with an average change across all 30 stocks of plus 0.44 per cent. The SPDR STI ETF, the exchange-traded fund that tracks the index, closed at $5.76, unchanged from its previous close, and within its own 52-week range of $4.288 to $5.898.
The mid-week softness was consistent with regional moves. Yahoo Finance reported on 19 August that Singapore shares closed in the red, tracking a sharp overnight sell-off in technology shares on Wall Street [1]. The Business Times reported that the STI fell 0.4 per cent on Thursday 20 August, the session immediately before Friday's rebound [2]. Taken together, the week's pattern shows an index that peaked at the start of the period, gave back ground through the middle sessions, and then steadied on the final day without recovering all of its losses.
Sector-by-sector analysis
The data's sector breakdown for Friday shows Utilities leading the field with an average gain of 1.68 per cent, a sector that contains a single constituent, Sembcorp Industries, which closed at $6.04. Energy, also a one-stock sector, averaged 1.42 per cent, reflecting Seatrium's rise to $2.15. The largest grouping, Real Estate, spans 12 constituents and averaged a 0.69 per cent gain. Consumer Defensive, with three stocks, added 0.64 per cent, and Financial Services, with four, rose 0.39 per cent. The remaining sectors were flat to lower: Consumer Cyclical was unchanged, Industrials eased 0.01 per cent across six stocks, Technology fell 0.35 per cent and Communication Services dropped 1.12 per cent, with Singtel closing at $4.40.
The banks remain the centre of gravity for trading in the index. DBS Group Holdings saw about S$256.0 million change hands on Friday, the highest turnover of any constituent, followed by OCBC at about S$179.3 million and UOB at about S$155.2 million, according to the data. Together, the three lenders accounted for roughly S$590 million of the day's traded value. DBS has reported half-year 2026 net income of S$6,009 million and confirmed second-quarter cash and capital return dividends totalling S$0.81 per share, according to a report carried by Yahoo Finance [3]. The same report noted that DBS's share price had risen about 24 per cent over the 90 days to mid-August, and that the bank recently announced a leadership transition [3]. A separate analysis by Simply Wall St, published on Yahoo Finance on 18 August, suggested the counter could be about 19 per cent below its estimated fair value [4]. That is the analyst's own calculation, and the data notes only that DBS closed at $76.00, within 5 per cent of its 52-week high of $77.97.
The real estate space told a more varied story. While the sector averaged a gain on Friday, several trusts are hovering close to their 52-week lows. The data flags CapitaLand Ascendas REIT at $2.46 against a low of $2.41, Frasers Centrepoint Trust at $2.19 against $2.17, Mapletree Industrial Trust at $1.92 against $1.89, Mapletree Logistics Trust at $1.17 against $1.14 and Mapletree Pan Asia Commercial Trust at $1.28 against $1.22 — all within 5 per cent of their lows. At the same time, these names carry the highest dividend yields in the index: Mapletree Industrial Trust at 6.56 per cent, CapitaLand Ascendas REIT at 6.34 per cent, Frasers Logistics & Commercial Trust at 6.24 per cent, Mapletree Logistics Trust at 6.24 per cent and Mapletree Pan Asia Commercial Trust at 6.17 per cent. Interest in the data centre REIT segment has been building, with The Business Times reporting on 16 August that data centre S-REITs are being powered ahead by artificial intelligence and cloud growth [5]. The elevated trading volumes in the Mapletree stable on Friday, covered below, show that these trusts are drawing noticeable investor attention even as their share prices sit near the lows.
Top gainers and losers analysis
City Developments Limited was Friday's top gainer, rising 1.73 per cent to $8.25. The property group was also the index's second-best performer across the full week, climbing 2.10 per cent from $8.08 at the start of the period, and the data lists it among the five constituents with the lowest price-to-earnings ratios, at 9.1 times. Its revenue growth of 61.1 per cent is the highest of any constituent for which the data records a figure.
Sembcorp Industries added 1.68 per cent to close at $6.04, extending a weekly gain of 1.17 per cent from $5.97. The stock's beta of 0.06 in the data is the lowest among the constituents listed, indicating that its historical price moves have been only weakly correlated with swings in the broader market. Seatrium rose 1.42 per cent to $2.15, and Wilmar International gained 1.37 per cent to $3.71 on 1.6 times its average volume, with a weekly advance of 1.09 per cent. Yangzijiang Shipbuilding rounded out the top five, up 1.28 per cent to $4.76, a level within 5 per cent of its 52-week high of $4.88. The shipbuilder's beta of 0.87 is among the highest in the index, and its revenue growth of 36.2 per cent is the second-highest recorded in the data.
On the losing side, SATS Ltd was the index's steepest decliner for the day and for the week. The ground handling and catering group fell 1.21 per cent on Friday to $4.07, and over the full week it dropped 14.32 per cent from $4.75. Its volume on Friday was 2.6 times its average, and at roughly S$82.6 million it was the most heavily traded stock outside the three banks and Singtel. The data does not identify the driver of the move, and no announcement from the company appears in the recent news list. What the figures show is a sharp, high-volume decline that has taken the stock to $4.07, below its 50-day moving average of $4.55 while remaining above its 200-day moving average. In commentary carried on The Straits Times' stock market page, OCBC's head of equity research Carmen Lee was quoted as saying that if the fundamentals of a company are sound, price weakness is an opportunity to accumulate quality stock at a lower valuation [6]. That observation was general in nature and not specific to SATS.
Singapore Telecommunications fell 1.12 per cent to $4.40 on Friday, and Singapore Technologies Engineering lost 1.11 per cent to $10.68, extending a weekly decline of 4.04 per cent from $11.13. Venture Corporation eased 0.35 per cent to $16.90, and Singapore Exchange dipped 0.08 per cent to $24.89, a stock that nonetheless closed within 5 per cent of its 52-week high of $25.50 despite a weekly loss of 2.39 per cent from $25.50.
Volume and momentum analysis
Unusual volume was concentrated in a handful of names on Friday, according to the data. SATS led with 2.6 times its average volume, followed by Mapletree Industrial Trust at 2.2 times, Mapletree Pan Asia Commercial Trust at 2.1 times, Wilmar International at 1.6 times and Mapletree Logistics Trust at 1.5 times. The clustering of three Mapletree trusts among the five most actively traded relative to their averages suggests the REIT complex was a focal point of trading during the session, consistent with the ongoing market interest in data centre and logistics real estate reported by The Business Times [5].
Turnover, measured by value traded rather than volume relative to average, tells a different story. DBS, OCBC and UOB dominated, with Singtel at about S$81.3 million and SATS at about S$82.6 million completing the top five. The gap between the value leaders and the rest of the market underscores how heavily the index's performance is anchored by the banking sector, which makes up three of the four Financial Services constituents.
The data also reveals a clear split in momentum across the index. At one end, DBS, OCBC, Singapore Exchange and Yangzijiang Shipbuilding all closed within 5 per cent of their 52-week highs. At the other, the five REITs named earlier are within 5 per cent of their 52-week lows. In between, a group of stocks sits below their 50-day moving averages but above their 200-day moving averages — CapitaLand Integrated Commercial Trust at $2.40 against a 50-day average of $2.42, SATS at $4.07 against $4.55, Singapore Airlines at $6.94 against $7.48, UOB at $40.53 against $41.66 and Wilmar at $3.71 against $3.78. These figures indicate that over the medium term these counters have pulled back from recent levels while remaining above their longer-term trend lines, a pattern that traders often watch but that the data itself does not interpret.
Impact of macroeconomic or geopolitical factors
The week's trading took place against a backdrop of geopolitical strain and shifting interest rate expectations. Yahoo Finance reported on 21 August that Singapore stocks opened lower as a United States threat to impose tariffs added to broader geopolitical uncertainty, with rising crude oil prices also weighing on regional risk sentiment [7]. The Business Times reported the same day that Asian shares were bound for a weekly fall as bond yields and oil prices stayed high [8]. These factors help explain why the STI gave up ground through the middle of the week despite the generally positive corporate headlines that preceded the period.
There were countervailing forces. On 14 August, the Singapore government lifted its full-year growth forecast on the back of an artificial intelligence-fuelled export boom, as reported by Yahoo Finance [9]. That upgrade framed the start of the trading week and supports the revenue growth figures recorded in the data for several constituents, including Yangzijiang Shipbuilding at 36.2 per cent, Sembcorp at 28.2 per cent, Keppel at 24.6 per cent and City Developments at 61.1 per cent. The pullback in technology shares on Wall Street, reported on 19 August [1], also spilled into local sentiment, a reminder of how closely Singapore's market tracks global risk appetite given the city-state's position as an open trading and financial hub.
For the energy-linked and defensive names, the data shows resilience. Sembcorp Industries led the Utilities sector and Seatrium led Energy on Friday, both registering gains in a week when the broader index fell. The data does not link these moves to oil prices directly, but the contemporaneous reporting on crude oil's strength [7][8] provides context for the relative firmness of these counters.
What the data shows about stability and volatility
The data includes market capitalisation, beta and revenue growth figures that describe the stability and volatility characteristics of the constituents. The banks and many defensive names show low betas — the measure of how much a stock's price has historically moved relative to the market — with OCBC at 0.20, UOB at 0.38, DBS at 0.29, Singtel at 0.25, Singapore Exchange at 0.26, Thailand-based Thai Beverage at 0.46 and Hongkong Land at 0.35. Several industrial and commodity-related names show even lower betas, including Sembcorp at 0.06 and Wilmar at 0.11. At the higher end, Yangzijiang Shipbuilding at 0.87, Keppel DC REIT at 0.84 and Venture Corporation at 0.60 have historically moved more in line with, or more sharply than, the overall market.
Market capitalisation figures in the data range from DBS at S$216.1 billion and OCBC at S$139.1 billion down to mid-cap names such as Sembcorp at S$10.8 billion and Thai Beverage at S$11.7 billion. Revenue growth, where recorded, ranges widely, from 5.9 per cent for CapitaLand Ascendas REIT to 61.1 per cent for City Developments. The dividend yield figures, as noted, are concentrated in the REIT segment, with five trusts yielding more than 6 per cent.
The contrast between the banks, trading within 5 per cent of their 52-week highs, and the REITs, trading within 5 per cent of their lows, is the most striking feature of the current data. Both groups have delivered stability in different forms — the banks through scale and low beta, the REITs through double-digit yields — but the share price trajectories diverge sharply. The data records these positions without judging them, and the divergence may simply reflect the market's shifting preferences between yield and growth at a time of elevated geopolitical uncertainty.
What to watch in the coming week
Several scheduled events will occupy investors in the week ahead. DBS Group Holdings pays its dividend on 25 August, with OCBC and UOB following on 28 August, according to a report by Yahoo Finance on Singapore banks preparing to make payouts [10]. Singapore Airlines also pays on 28 August, and Olam Group on 31 August; Yahoo Finance noted that Temasek holds about 28 per cent of DBS, 50 per cent of SIA and 52 per cent of Olam as at 31 March 2026 [11]. These payment dates will put the banks and the airline in focus even in the absence of earnings announcements.
The policy and market-structure conversation around Singapore Exchange is also set to continue. SGX chief executive Loh Boon Chye said on 19 August that the exchange "needs to be better understood," as reported by The Business Times [12]. The Straits Times reported on 20 August that Singapore's proposed reforms aim to boost the asset management sector amid rising competition with Hong Kong, noting that SGX recorded 16 initial public offerings in 2025 and eight listings so far in 2026, raising about $1.4 billion [13]. The Business Times has also raised the question of whether SGX should follow Hong Kong's lead on longer trading hours [14], and, separately, has examined the lessons for Singapore's retail fund push from South Korea's leveraged ETF crisis [15]. These are structural issues that can shape how the local market is viewed by international investors, even if their effects on individual share prices are not immediately visible.
For the REIT segment, the elevated volumes in the Mapletree trusts and the ongoing reporting on data centre demand [5] suggest that any news on occupancy, leasing or acquisitions from the trusts could draw outsized attention. The weekly data leaves the index at 5,689.00, near the top of its 52-week range, with the banks near their highs and the REITs near their lows — a divergence that will be worth watching to see whether it narrows or widens in the sessions ahead. As always, the figures describe where the market has been, not where it is going.
References
[1] Yahoo Finance; Singapore Shares Remain in Red Amid Sell-off in Tech Shares; Medi Lifestyle Down 7%; 19 Aug 2026
[2] The Business Times; Singapore stocks fall on Thursday; STI down 0.4%; 20 Aug 2026
[3] Yahoo Finance; Does Strong Interim Dividends And Leadership Transition News Change The Bull Case For DBS (SGX:D05)?; 18 Aug 2026
[4] Yahoo Finance; DBS Group Holdings (SGX:D05) Could Be 19% Below Fair Value On Dividend Confidence; 18 Aug 2026
[5] The Business Times; Data centre S-Reits power ahead on AI and cloud growth; 16 Aug 2026
[6] The Straits Times; Latest Stock market | The Straits Times; http://www.straitstimes.com/tags/stock-market
[7] Yahoo Finance; Singapore Shares Open Lower Amid US Threat to Impose Tariffs; 21 Aug 2026
[8] The Business Times; Asia shares bound for weekly fall as bond yields, oil stay high; 21 Aug 2026
[9] Yahoo Finance; Top Stock Market Highlights of the Week: Singapore's Growth Upgrade, Digital Core REIT and CapitaLand Investment; 14 Aug 2026
[10] Yahoo Finance; Passive Income Boost: Singapore Banks Prepare to Pay; 20 Aug 2026
[11] Yahoo Finance; 3 Temasek-Backed Dividend Stocks Rewarding Investors Before September 2026; 19 Aug 2026
[12] The Business Times; 'SGX needs to be better understood,' says CEO Loh Boon Chye; 19 Aug 2026
[13] The Straits Times; Singapore's proposed reforms aim to boost its asset management sector amid rising competition from Hong Kong; 20 Aug 2026
[14] The Business Times; Should SGX follow Hong Kong's lead on longer trading hours?; 18 Aug 2026
[15] The Business Times; More products, more risks? South Korea's leveraged ETF crisis has lessons for S'pore's retail fund push; 21 Aug 2026
Disclaimer
Not financial advice. The author is not licensed to provide investment advice in Singapore. This is general commentary and personal opinion based on publicly available information, and does not take account of your objectives, financial situation or needs. Figures are compiled from public sources and may be incomplete, delayed or wrong — verify against the company's own filings and SGX before relying on anything here. The author may hold positions in the securities mentioned. Do your own research, and consider speaking to a licensed financial adviser before making any investment decision.
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