Real estate firm Cushman & Wakefield is ranking Calgary with Moscow, Houston, and Aberdeen, Scotland, as the "oil-centric cities" whose downtown office real estate markets have been hardest hit by the global oil price shock.

In a new report, it predicts the vacancy rate for downtown Calgary’s Class-A buildings — the best quality offices in the tallest buildings — will hit 27.5 per cent by the end of next year, the highest since the company began tracking numbers in 1985. Canadian research director Stuart Barron said the estimation…