"There is certainly a bit of trimming going on with people's expectations," said one fund manager.
Forsyth Barr head of research Rob Mercer said the timing of any rebuilding activity in Christchurch continued to be problematic, especially since aftershocks continue to plague the city.
"It's still hard for people to commit to the rebuild," he told APNZ.
Fletcher Building's share price has gone from $9.52 in April to $5.92 yesterday.
"I think the market was certainly over-confident when it was trading over $9.00 but similarly, it has now moved to an overly pessimistic level," said Mercer, who declined to disclose his own forecast for the company's earnings.
He said Fletcher Building's guidances were such that there was a reasonable level of confidence that they could achieve them. However, the market's view was one of caution.
"There is certainly a view that there is still pressure on their short term earnings and some people are going below their (Fletcher Building's) guidance," he said.
Fletcher Building bought Australian pipe manufacturer and distributor Crane for A$1 billion in March.
Mercer said the market still regarded Crane as being a positive move, even though Fletcher Building had paid a "full" price.