Shares in Irish silicon chip design company Parthus continued to rally in London and Nasdaq yesterday as investors bought into positive sentiment generated by Wednesday's launch of its new global positioning product, NavStream.

Parthus shares closed up 49 1/2p sterling at 321p in London, and up $5.50 to close at $46.50 on the Nasdaq. These gains came on top of a 17 per cent rise in London and more than a 20 per cent jump on the Nasdaq on Wednesday.