More than three quarters of wealthy individuals polled in a new Morgan Stanley study have confidence the economy will remain the same or improve by year-end.

The Morgan Stanley Wealth Management semi-annual Investor Pulse Poll found 76% of respondents showed confidence in the economy's sustainability and growth potential, up 10% from a previous study made in 2013.

Nearly 75% of those polled also believe the global economy will be the same or better by the end of the year, up from 72% in 2013. Optimism in personal wealth rose to 93%, an increase of 7.5% from the previous poll, and continuing an upward trend from 2013, when 86% of respondents expected their portfolios would remain the same or see improvements by the following year.

Morgan Stanley asked 1,008 investors, ages 25 to 75 with $100,000 or more of investable household assets, to consider some of the top investment prospects of 2015. A third of the investors had assets exceeding $1 million.

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