"Investors have to be mindful of the fact that some businesses have US and Australian dollar exposure," said James Smalley, a director at Hamilton Hindin Greene. "This high currency is going to affect a number of these exporters' earnings."
Westpac declined 2.8 per cent to $29.05 and ANZ Bank fell 1.2 per cent to $23.98. Standard & Poor's on Thursday put Australia's major lenders on a "negative" outlook, following a similar downgrade to Australia's sovereign rating outlook.
Ebos Group, which counts Australia as its biggest market, fell 0.9 per cent to $16.01.
Spark was the biggest gainer, rising 3 per cent to $3.76. Sky TV rose 2.7 per cent to $4.88 and Heartland Bank gained 1.6 per cent to $1.25.
Smalley said while some investors may have sold shares yesterday to take advantage of recent gains, the market remained attractive to those facing paltry returns from bank deposits.
Delegat Group rose 2.5 per cent to $6.15 after revising its forecast net operating profit for the 2016 financial year up $1 million to $37 million on record case sales.
Blis Technologies stock fell 8.5 per cent to 4.3c after telling the NZX it wasn't in possession of any material information that could explain a 42 per cent surge in its stock price since June 30.