The Australian Securities Exchange (ASX) says a system problem at index provider Standard & Poor's (S&P) prevented it from supplying prices on its leading stock indices on Friday morning.
An ASX spokesman Matthew Gibbs told reporters that due to the problem at S&P no prices were being relayed to the market, even though trades were being processed.
No data on the movement and level of market indices, including the benchmark S&P/ASX 200 index and the All Ordinaries index, were available on Friday morning.
Gibbs said only data pertaining to the various indices is affected, so normal trading was still taking place.