If you’d invested in: Altitude Group and Sepura

If only you'd invested in

Altitude Group (Aim: ALT) provides services to the promotional products industry, including cloud-based software, websites, exhibitions and information services. The latest interim results show a move to a pre-tax profit of £0.4m in the first half of this year, compared with a loss of £0.7m in the same period last year. The share price is up by more than 300% since the start of September, though the management knows of "no corporate or operational reason" for the spectacular rise.

Be glad you didn't

Sepura (Aim: SEPU) makes digital radios and communications equipment for the transport, utilities, energy and mining sectors. It was founded in 2012 and is headquartered in Cambridge and now sells to over 30 countries. It warned in April that earnings would be lower than expected, and issued a second profit warning last month, cautioning that it may have to begin talks with lenders about waiving covenants next year. In the last year the share price has dropped by 90%.

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