Indonesia’s consumer confidence index rose to a six-month high in December amid rising optimism about the country's economic growth prospects despite a likely global slowdown, a survey from Danareksa Research Institute showed on Wednesday.

The index rose 0.2 point to 91.6 in December, the survey showed, marking the highest result in six months, Purbaya Yudhi Sadewa, chief economist at Danareksa Research Institute, said on Wednesday.

That survey used samples from 1,700 households in six large Indonesian cities.