Below are the main movers at 4pm.
RISERS
Rambler Metals and Mining (LON:RMM) up 17.95%. The mining and exploration company completed a pre-feasibility assessment at its Ming copper-gold mine in Canada.
Strategic Minerals (LON:SML) up 15.2%. Chief executive John Peters acquired 3 million shares in the company for 0.6 pence. "My purchase, at significantly above market, reflects my continued confidence in the company" he said.
Petro Matad (LON:MATD) up 14.9%. Shares continue to rise after the company appointed a new chief executive and chairman on Friday.
Optibiotix (LON:OPTI) up 11.4%. The company was boosted by a newspaper recommendation over the weekend.
FALLERS
Peer TV (LON:PTV) down 13.9%. The company issued 16.7mln shares at a price of 0.0999 pence to YA Global SPV Ltd under a convertible loan note facility agreed in February.
Kirkland Lake Gold (LON:KGI) down 18%. The company updated the market that its shares will cease trading on AIM on August 3.
Atlas Development (LON:ADSS) down 10.8%. Shares in the support services company continue to slide after it said on Friday that it expects to make a loss in the first half of the year, and warned that the second half will also be tough.
Below are the min news driven share price movements at 9am.
RISERS
Standard Chartered (LON:STAN), the insurance giant, added 1.28% as it unveiled a new management team, headed up by Bill Withers, CEO, which it says will "deliver a plan to address the future performance of the group by year-end".
Elsewhere, software developer Aveva (LON:AVV) surged 28.44% after engineering firm Schneider Electric said it would acquire it in a reverse takeover deal.
Tomco Energy (LON:TOM) raced up almost 39%, building on Friday's gains, when it confirmed it reached its key strategic goal for the Holliday Block shale oil project in Utah.
FALLERS
Gold miner Centamin (LON:CEY) dropped 4.75% as the gold price slumped to a five year-low.
Balfour Beatty (LON:BBY),the UK construction giant, was also slipping again, losing 0.85%. Last week the group issued a profit warning for 2015 but said it was seeing signs of improving cash performance.
88 Energy (LON:88E) slipped 15.38% after it said shares in Australia were suspended pending an announcement about a capital raise.