SIA Engineering has displaced CapitaLand Ascott Trust from the reserve list of the Straits Times Index.
Meanwhile, there are no changes to Singapore's benchmark index, according to the index managers in their quarterly review.
With SIA Engineering's inclusion, the other four stocks in the reserve are Keppel REIT, NetLink NBN Trust, Sheng Siong Group and Suntec REIT.
The next review will take place in June.
SIA Engineering shares closed $3.22 on March 5, down 0.92% for the day but up 36.44% in the past year.
CLAS, meanwhile, closed at 93 cents, unchanged for the day, up 8.14% in the past year.
