Almost half (48 per cent) plan to make net increases to their investments in the next three months, up significantly from 36 per cent in October, data from Phoenix Marketing International shows.   

This is the highest percentage Phoenix has logged since August 2007.

Mass affluent investors were a little more skittish. Twenty-nine per cent said they planned to make net increases over the next three months, up from 25 per cent in the previous period and from a low of 20 per cent at mid-year 2010, Phoenix found. 

The percent of affluent investors who felt they would stay on the sidelines dropped for the fourth period in a row to 60 per cent. 

Phoenix defines the mass affluent as those with $250,000-$999,000 in investable assets and millionaire investors as those with $1 million and above.