The Japanese Jasdaq stock exchange was knocked offline this morning by a computer glitch. Trading was halted from 9 am local time until about 10.20am.

The problem was revealed on the Jasdaq Securities Exchange's website, but it did not give precise details - the exchange had suffered a technical issue with a part of its computerised trading system, is all it revealed.

Based in Tokyo, Jasdaq is a market aimed at small and venture companies. The exchange issued an apology for the inconvenience. And then, in an ironic twist, the company issued another apology after the first was not visible because demand pushed its website offline.

No-one from the exchange was available for comment.