The Straits Times Index (SGX: ^STI) delivered an impressive performance this year, surging past the 4,200-level back in July. Along the way, several blue-chip stocks within the bellwether index also saw their share prices surge in tandem. Buoyed by encouraging business developments and good results, investors bid up the share prices of these stalwarts, causing them to surge by double-digit percentages this year. We profile five such blue-chip stocks to assess if they deserve a place within your buy watchlist.

City Developments Limited (SGX: C09)

City Developments Limited, or CDL, is a real estate group with a network spanning 168 locations in 29 countries and regions. The group saw its share price surge 32.6% year-to-date (YTD) and is close to its 52-week high of S$7.02. CDL reported a respectable set of earnings for the first half of 2025 (1H 2025). Revenue rose 8% year on year to S$1.69 billion while net profit inched up 3.9% year on year to S$91.2 million....