Residential sales and letting agency Foxtons (FOXT) rises 21% to 279p as conditional dealings limited to institutional investors get underway. Retail investors get their first chance to trade shares in the £785 million cap next Wednesday (25 Sep).

Specialist engineer Tanfield (TAN:AIM) slips 14.4% to 19.25p as it fails to achieve an outright disposal of its struggling powered access or ?cherry picker? division Snorkel. Read our news analysis on the transaction.

A mere two months after joining the stockmarket, video games translation expert Keywords Studios (KWS:AIM) has issued a profit warning that sends its share price down 18.8% to 133.5p. It has blamed the forthcoming high-profile launch of new Xbox and PlayStation consoles in November for disrupting the industry. Those will grab consumers' attention so other video games publishers have decided to defer product launches. The Xbox and PlayStation consoles are also launching in fewer initial territories than expected, so there will be reduced language translation requirements.

Matchtech (MTEC:AIM) has raised £4.3 million through a placing at 405p per share, an 8.7% discount to yesterday's price. The money will help repay debt used to fund its recent acquisition of Provanis. The engineering recruiter has also appointed Brian Wilkinson as executive chairman, a former board member of staffing group Randstad. The shares dip 2.5% to 432.5p.

A big data deal in China for WANdisco (WAND:AIM) marks its third since launching the product suite, by Shares' count, a move we anticipated back in January. The market shrugs off the news, the shares staying roughly flat at £11.35, with key interims results up next week (Tuesday).

A dual-fuel development partnership with engineering expert Ricardo (RCDO) drives Clean Air Power (CAP:AIM) over 5% higher to 12.62p. Looks like a fine endorsement to a story Shares has covered several times, most recently in July at 8.75p.

Malaysian volume text marketeer Macromac (MACC:AIM) gets its modest Aim debut away, although investors may wish it hadn't. It's raised just £475,000 at a starting price of 10p per share, already up to 14p. But its effectively 'spam' texting business model is unlikely to appeal to a mass investor market long-term.

Digital health technology tiddler Fitbug (FITB:AIM) dives 23.3% to 1.15p on disappointing half-year figures. A ramp up in investment spend widens losses from £649,000 to £1.05 million on lower revenues, while Fitbug also flags a dwindling half-year cash pile of £284,000 (2012: £1.14 million). Nevertheless, the activity tracking specialist remains upbeat, highlighting a strong pipeline of new business opportunities in the buoyant Connected Health Market.

Toys-to-bicycles distributor Tandem (TND:AIM) reverses 3p to 93.5p on poor first-half figures showing a lurch into the red. With demand dampened by poor weather, the £4.4 million cap reports lower sales of £11.25 million (2012: £14.37 million). Taxable profits of £190,000 make way for £500,000 losses after exceptional redundancy and rising finance costs, although Tandem flags promising trading in July to September.

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Issue Date: 20 Sep 2013