In the markets on Tuesday, the Top 50 share index fell 30 points to 4576.
Software provider Diligent had another bad day, falling 38 cents to $5.67.
The stock has fallen from a high of $8.20 in May and its steep decline in recent days has prompted a query from the stock exchange.
Diligent says that it is complying with the exchange's disclosure rules.
Accounting software company Xero also had a bad day, dropping 96 cents to $15.74.
Its shares have fallen from $18.90 earlier this month.
Newcomer SLI Systems, which provides online search services for retailers and other businesses, rose 10 cents to $2.35
The cross rates on Tuesday were 78.30 US cents, 85.36 Australian cents, 51.82 British pence, 59.90 euro, 78.09 yen and The Trade Weighted Index stood at 74.36.