"Addoha was a big disappointment -- to now people have been expecting something around 2 billion dirhams profit in the full year," said a Casablanca analyst who asked not to be named.
Addoha's stock was suspended limit-down, with bids of 120 dirhams well below a market trading limit of 157.95 dirhams. The wider MASI index .MASI was down 3.9 percent at 12,470 points at 1319 GMT.
A recent drop in the benchmark index has almost wiped out gains earlier in the year that came against a backdrop of sliding world stock indexes.
Real estate firms powered the biggest Maghreb stock market to a record high earlier in the year as investors sought to benefit from a local building boom and accelerating private sector investment in the country of 33 million.
But analysts have voiced concern over the real estate sector outlook in recent weeks as the global credit crisis threatens to dry up much of the inward investment that underpins the market.
Addoha shares soared after a listing in 2006. Last year it sold new equity to fund a series of land purchases and bought 50 percent of Spanish builder Fadesa's Moroccan arm in a deal worth 1.3 billion dirhams.
Fadesa's parent company Martinsa Fadesa was put into administration in July after falling victim to the collapse of Spain's housing market.
Addoha said on Tuesday it expected to complete the acquisition of land from Fadesa's Moroccan business before the end of the year and was upbeat about its earnings prospects.
"Sales and the net result in the second half of 2008 should register a clear increase compared to the previous half," it said, citing an expected jump in deliveries of new homes. (Reporting by Tom Pfeiffer; editing by Simon Jessop)