Stocks of interest on the Australian Securities Exchange on Wednesday:

AMP – AMP – up three cents, or 0.45 per cent, at $6.72

Activist investors including former Patrick Corporation chief executive Chris Corrigan built a stake in AMP last year with a view to shaking up the financial giant.

BHP – BHP BILLITON – down 30 cents, or one per cent, at $29.12

RIO – RIO TINTO – down 34 cents, or 0.6 per cent, at $54.96

FMG – FORTESCUE METALS GROUP – up six cents, or 3.4 per cent, at $1.835

The credit ratings of BHP Billiton, Rio Tinto and Fortescue Metals are set to be cut by ratings agency Standard and Poor’s after the steady plunge in iron ore prices, while Fortescue has restructured rosters for its mine workers in its latest move to reduce costs.

TCL – TRANSURBAN – up 13 cents, or 1.3 per cent, at $9.93

Toll road operator Transurban has posted a healthy lift in third quarter revenuesaided by it taking full control of Sydney’s Cross City Tunnel and its acquisition of Queensland Motorways.