Confidence among affluent investors grew in the second quarter, according to the TNS Investor Confidence Index.

The quarterly survey released Monday by Taylor Nelson Sofres, a unit of Kantar Group, said that confidence rose 5.9%, to 107, from the previous quarter. Only once in the past eight years — in October — did the index fall below 100, the level at which optimism is exactly offset by pessimism.

The company said that, though still low historically, the index's increase indicated greater optimism about affluent households' personal finances, particularly expectations for their investments.

Taylor Nelson Sofres said 78% of affluent investors say their investments' value would grow or remain steady during the next six months. In October, 53% of affluent households expected the value of their investments to decline.

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