Today's 15 per cent decline the share price of NZX-listed Chorus has drawn a "please explain'' inquiry from the ASX, where the telecommunications network company is also listed.
Chorus told the ASX that it was not aware of any information, which had not been announced, that could explain the decline.
But the company said: ''Chorus has been the subject of a range of third party announcements and considerable third party speculation, particularly concerning the UBA (unbundled bitstream access) pricing process.''
By mid afternoon, the stock was trading at $1.515 - down 27 cents or 15.1 per cent. The stock had earlier fallen to $1.47 - its lowest point since the stock became a separately listed entity after being split out of Telecom.
Chorus has lost half its value since July, when it traded at $3.03.