London's FTSE 100 trades 13.1 points lower at 6,845.9 in early dealings, investors cautious with corporate news thin on the ground and once again turning their attentions to the US Federal Reserve's Jackson Hole meeting later this week.

Among the key movers is Irish-headquartered insulation and specialist building materials maker Kingspan (KGP), which clips ahead 5.4% to €24 on its strongest ever six monthly performance. Record interims are far ahead of expectations, showing a 50% trading profit hike to €167.3 million driven by organic growth and with a boost from the Joris Ide and Vicwest businesses acquired last year.

CEO Gene Murtagh says the good order intake momentum seen in the second quarter has continued into the second half, while broker Davy is likely to upgrade its full-year profit forecast by over 10% to around €320 million.

A pullback in the gold price puts shares in precious metal miners off to a disappointing start to the new week. Hochschild Mining (HOC), Fresnillo (FRES) and Randgold Resources (RRS) all fall by 2% to 4%.

The commodity price weakness overshadows positive news from gold and silver producer Polymetal (POLY), down 1.9% to £11.60, which has confirmed plans to expand its Amursk processing plant at a cost of $55 million.

Stellar Diamonds (STEL:AIM) has revealed details of the reverse takeover unveiled last week. It is trying to buy a project next door to its Tongo mine in Sierra Leone which could result in a threefold increase in annual diamond production. Read our news analysis to get the full details.

365 Agile (365:AIM) dives 20.9% to 26.5p after warning that it may have to close an office and make staff redundant as plans to create a meaningful business in the Internet of Things space haven’t gone to plan.

Further equipment changes to a tungsten mine in Zambia, disappointing exploration news and the issue of new loan notes send shares in Premier African Minerals (PREM:AIM) down 26.9% to 0.48p.

TalkSport-owner Wireless (WLG), in the process of being taken over by News Corp, is bid up 0.25p to 310.25p on solid interims boosted by the Euro 2016 football championships.

Autins (AUTG:AIM), a maker and supplier of noise and heat management products to the car industry, motors 20.5% higher to 202.5p in debut AIM dealings, having raised £26.6 million through an oversubscribed placing priced at 168p.

Mobile gaming provider Nektan (NKTN:AIM) nudges 2.35% higher to 43.5p on the sale of three gaming brands – Chomp Casino, Spin Princess and Sapphire Rooms – for up to £1.95 million in cash.

Issue Date: 22 Aug 2016