Shares in a2 Milk dropped by 1.95 per cent in early trading on the NZX, despite the alternative milk company releasing an upbeat trading update just before the market's open.
By mid-morning the stock was down 23c at $11.54 after, having earlier opened just marginally down.
The company said it had lifted its annual sales for the June year by 68 per cent, just beating the company's guidance given in May.
A2 Milk said it expected to maintain an earnings margin of about 30 per cent in the coming year, even with increased spending.
The Auckland-based, Sydney-headquartered company said revenue was $922m in the year ended June 30, up from $549.5m a year earlier, and just beating the $900m-to-$920 m forecast in May.