Zambia-focused copper exploration group Arc Minerals Limited (AIM:ARCM) said it posted a £2.28 million loss for the six months to June 30, with a basic loss per share of 0.16 pence. In a brief update, investors were told the operating loss was £2.12 million. The company reported assets of £11.42 million against liabilities of £1.49 million, leaving net assets at £9.93 million. Cash stood at £682,000, with intangible assets of £2.32 million and long-term receivables of £5.9 million.