Second quarter operating profit at Spartan Stores, the US supermarket chain, rose 80% to $13.2m thanks to higher gross margin and lower operating expenses. Net sales for the 12 weeks to September 11 were $486.7m compared with $491.4m. A net profit of $7m compares with $1.8m a year earlier. Retail sales for its supermarket business showed strong increases, but this was offset by lower prescription sales at instore pharmacies.

The company expects a 1% increase in consolidated net sales for its full financial year.