Business Weekly - Cambridge, UK

Some impressive rises among its 10 biggest caps meant that the SHAREtrack - in association with PricewaterhouseCoopers - outperformed the major indices on both sides of the Atlantic, all of which had a strong week.

Two of SHAREtrack's 10 biggest market caps put in double digit gains, while its biggest cap, Johnson Matthey in Royston mustered a five per cent increase.

As a catalytic converter specialist, the FTSE 100 metals company continues to benefit from the market appetite for proven green technologies.

Autonomy, the index's 10th biggest company - and now offically Cambridge's second biggest tech company after ARM - rose by a prodigious 20.4 per cent, boosted by a series of contract announcements and the well-received $375m acquisition of US content archiving specialist, Zantaz.

Brewer and pub owner, Greene King, which has a larger market capitalisation at £1.48bn, also put it in a cause-helping (and 12 month-high) 14 per cent rise, driven by news that it would be separating its real estate activities through a joint venture and buying back £100m of its shares.

Starting the year at 77p, Pursuit Dynamics is going like a train in 2007, closing out this week 8.6 per cent up at 332.5p without any major news announcements. The Royston based company has developed a supersonic pump applicable in a seemingly endless number of different industry segments.

The troubled duo of antenna maker Sarantel and flat panel speaker developer NXT headed up the list of biggest fallers, with 15 per cent and 11.8 per cent slides, respectively.

Both being comparative minnows, the performance had a negligible effect on the overall standing of the Index.

Beginning to resemble a basket case, NXT appears to still be reaping the ill-will from the profits warning it issued at the end of May. Closing out last year at close to 40p, its shares are now worth 15p.