The Colombo Stock Exchange began the week on a mixed note on Monday, 10 August 2026, with the All Share Price Index extending its positive momentum for a fourth consecutive session, while the S&P Sri Lanka 20 Index closed marginally lower.The ASPI gained 47.38 points, or 0.22%, to close at 21,417.47. In contrast, the S&P SL20 declined by 2.67 points, or 0.04%, to end the session at 5,985.49.

The ASPI advanced strongly during early trading and moved close to the 21,460 level before gradually easing towards the close. Meanwhile, the S&P SL20 remained under pressure for much of the session, suggesting that buying interest was more concentrated outside selected large-cap counters.

Total market turnover reached LKR 3.81 billion, with approximately 123.88 million shares changing hands during the session.The Retailing sector dominated market activity, generating LKR 1.05 billion in turnover from approximately 43.15 million shares. RIL.N accounted for almost the entire sector turnover, recording LKR 1.04 billion from approximately 43.0 million shares.Crossing transactions contributed approximately LKR 2.10 billion, representing around 55% of total equity turnover. The largest crossing was recorded in RIL.N, with LKR 1.03 billion in turnover from 42.50 million shares.

Foreign investors remained net sellers, recording a sizeable net foreign outflow of LKR 2.36 billion, adding some pressure to the overall session despite the continued advance in the broader market.Market breadth remained positive, with 124 securities advancing against 80 decliners, resulting in an advance-to-decline ratio of 1.55. The positive breadth indicated that buying interest remained reasonably broad despite the divergent performance of the two benchmark indices.HNB non-voting shares were the largest positive contributor to the ASPI, adding 10.87 points to the index. Royal Ceramics, Dialog Axiata, Prime Lands Residencies and Melstacorp also supported the market.

HNB voting shares recorded the largest negative contribution, reducing the ASPI by 11.29 points. Ceylinco Insurance, Hemas Holdings, Access Engineering and John Keells Holdings also weighed on the index.Among notable trades, RIL.N recorded the highest individual counter turnover of LKR 1.04 billion from approximately 43.0 million shares. The counter closed at LKR 25.90, gaining approximately 1.97% from the previous close.Overall, the market maintained its upward momentum for a fourth consecutive session, supported by positive market breadth and continued interest across a wider range of counters. However, the marginal decline in the S&P SL20 and sizeable foreign outflow indicated that sentiment among selected large-cap stocks remained mixed.