Office buildings in Singapore’s city fringes may be increasingly left vacant as tenants seek the opportunity to move into Grade A premises in the Central Business District (CBD) with rents weakening amid an onslaught of incoming supply. Pundits have blamed the weak office market here on a “fundamental miscalculation” on the part of some Singapore developers that had “misplaced optimism” that China would sustain its rapid pace of its growth and pull the rest of Asia along. With another 7 million square feet of new office space under construction at a time when businesses are holding back expansion plans, rents in Singapore will continue to tumble, analysts warned. Mr Nicholas Mak, executive director at SLP International Property Consultants, has forecast a 10 to 15 per cent fall in rents this year, accelerating from the 6.5 per cent decline last year.