Southeast Asian consumers remain the most optimistic in the world, even though levels in some markets have dipped from previous highs, Nielsen’s Consumer Confidence Index for the second quarter of 2015 has found.

The Philippines, Indonesia, Thailand and Vietnam have maintained their top 10 ranking as the most optimistic consumers globally.

However, the Philippines was the only market where consumer sentiment increased, ending the quarter at the highest levels on record. Nielsen says the continued influx of foreign investments and a robust domestic consumption base is driving optimism in the Philippines.

Vietnam and Malaysia both dropped. Nielsen says Vietnam’s optimism is being dampened by declining foreign direct investment and “a struggling retail environment”.