Blue-chip stocks are well-known for their resilience during economic cycles.They also pay out an attractive dividend that serves as passive income to help boost investors’ bank accounts.Here are five Singapore stocks that are hovering outside the blue-chip circle but have the potential to be included within the bellwether Straits Times Index (SGX: ^STI).Yes, I am talking about the reserve list, which contains five companies that may replace any stocks within the index that become ineligible due to corporate actions before the next review.The next review will take place in June 2025.

NetLink NBN Trust (SGX: CJLU)

NetLink NBN Trust is part of the NetLink Group that designs, builds, owns, and operates the passive fibre network infrastructure for Singapore’s Nationwide Broadband Network (NBN).This extensive network provides coverage to residential and non-residential premises.NetLink NBN Trust was recently selected to replace land transport giant ComfortDelGro Corporation (SGX: C52) in the reserve list.For the first half of fiscal 2025 (1H FY2025) ending 30 September 2024, the group saw revenue dip 0.2% year on year to S$204.8 million.Net profit fell by 8.3% year on year to S$48.5 million because of higher operating expenses.Despite the lower profit, NetLink NBN Trust declared and paid a distribution per unit (DPU) of S$0.0268, slightly higher than the S$0.0265 that was paid a year ago.NetLink NBN Trust’s latest business update for the first nine months of fiscal 2025 (9M FY2025) showed a similar 0.4% year-on-year dip in revenue to S$308.2 million.Net profit tumbled nearly 13% year on year to S$74.1 million.The group ended the calendar year 2024 with 1.5 million residential connections and 53,454 non-residential connections.

CapitaLand Ascott Trust (SGX: HMN)

CapitaLand Ascott Trust, or CLAS, is the largest lodging trust in Asia Pacific with a portfolio of 100 properties comprising more than 18,000 units in 45 cities across 16 countries.CLAS’ portfolio assets under management (AUM) stood at S$8.8 billion as of 31 December 2024.For 2024, revenue rose 9% year on year to S$809.5 million while gross profit increased 10% year on year to S$370.9 million.Distribution per stapled security (DPSS), however, dipped 7% year on year to S$0.061.CLAS saw its portfolio revenue per available unit (RevPAU) rise 9% year on year to S$176 for the fourth quarter of 2024 (4Q 2024).The manager aims to unlock value through divestments while investing in quality properties at higher yields.In addition, asset enhancement initiatives (AEIs) will help to enhance the properties’ performance and valuations.

Keppel DC REIT (SGX: AJBU)

Keppel DC REIT is a data centre REIT with a portfolio of 25 data centres across 10 countries.Its AUM stood at around S$5 billion as of 31 December 2024.The data centre REIT announced a solid set of earnings for 2024 with gross revenue rising 10.3% year on year to S$310.3 million.Net property income (NPI) improved 6.3% year on year to S$260.3 million.DPU inched up 0.7% year on year to S$0.09451.Keppel DC REIT enjoyed a high portfolio occupancy of 97.2% with a long portfolio weighted average lease expiry (WALE) of 6.3 years by net lettable area (NLA).The REIT also saw a strong portfolio rental reversion of ~39% for 2024 which attests to the strength of the demand for its properties.

Keppel REIT (SGX: K71U)

Keppel REIT is an office REIT that owns a portfolio of 13 properties in Singapore (4), Japan (1), South Korea (1), and Australia (7).Its AUM stood at S$9.5 billion as of 31 December 2024.For 2024, property income climbed 12.2% year on year to S$261.6 million while NPI increased by 10.7% year on year to S$201.9 million.Borrowing costs shot up 32.2% year on year for 2024, resulting in Keppel REIT’s DPU falling 3.4% year on year to S$0.056.Despite the lower DPU, the office REIT maintained a high portfolio occupancy of 97.9% as of 31 December 2024.Keppel REIT’s portfolio also saw a strong positive rental reversion of 13.2% for 2024.The REIT introduced new food and beverage outlets and a refreshed garden plaza as part of the AEI for One Raffles Quay.

Suntec REIT (SGX: T82U)

Suntec REIT holds properties in Suntec City, a majority interest in Suntec Singapore Convention & Exhibition Centre, and a one-third interest in One Raffles Quay and Marina Bay Financial Centre Towers 1 and 2.The REIT also owns stakes in several properties in Australia and the UK.2024 saw a minor 0.2% year-on-year increase in gross revenue to S$463.6 million.NPI slipped 0.8% year on year to S$310.8 million but DPU fell 13.2% year on year to S$0.06192 because of higher finance costs and vacancies at 55 Currie Street and the Minster Building.Suntec REIT’s portfolio valuation remained resilient for 2024, dipping by just 1.2% year on year to S$11.75 billion.The retail and office REIT had an aggregate leverage ratio of 42.3% along with an all-in financing cost of 3.84%.The manager expects to complete the refinancing of loans due this year by the first half of 2025.However, the all-in financing cost is expected to rise by 0.1 to 0.2 percentage points due to expiring hedges.Boost your portfolio’s returns with 5 SGX stocks that promise both stability and steady growth. We bring you the names of these rock-solid stocks, including why they could drive massive dividends over the next few years. If you’re looking to invest for retirement, this guide is a must-read. Click HERE to download now.Follow us on Facebook and Telegram for the latest investing news and analyses!Disclosure: Royston Yang owns shares of NetLink NBN Trust, Keppel DC REIT, and Suntec REIT.