Stocks to watch on the Australian stock exchange on Wednesday, April 22:

BXB – BRAMBLES – down 27 cents, or 2.4 per cent, at $11.04

Logistics giant Brambles has reaffirmed its full year profit guidance, despite slower-than-expected sales growth from its pallets business.

COH – COCHLEAR – up $1.19, or 1.4 per cent, at $88.79

A partial US legal victory for hearing implants maker Cochlear is heading for an appeal.

GEM – G8 EDUCATION – down 23 cents, or 6.5 per cent, at $3.33

Childcare centre operator G8 Education is facing steeper costs ahead of new laws on staff to child ratios coming into force in 2016.

LEI – LEIGHTON HOLDINGS – up 13 cents, or 0.65 per cent, at $20.28

Construction giant Leighton insists its history is not being rejected despite changing its name amid allegations of foreign corruption.

NRT – NOVOGEN – down 12.5 cents, or 30.1 per cent, at 29 cents

Cancer therapy biotech Novogen has placed its shares in a trading halt ahead of an expected announcement about a capital raising.

OSH – OIL SEARCH – down one cent, or 0.1 per cent, at $8.09

Oil Search remains on track to meet its full year production forecasts despite reporting a dip in the March quarter.

RIO – RIO TINTO – up 84 cents, or 1.5 per cent, at $55.50

Rio Tinto plans to increase iron ore sales this year to 350 million tonnes, despite prices being at decade lows and surprisingly weak quarterly production.

RTR – RUMBLE RESOURCES – up 0.3 cents, or 4.6 per cent, at 6.8 cents

Resources investor Eddie Sugar will join Nathan Tinkler as an adviser to fledgling West Australian nickel explorer Rumble Resources.

SGT – SINGAPORE TELECOMMUNICATIONS – down four cents, or 0.95 per cent, at $4.17

The Singapore-based company behind Optus says it has no plans to sell or cut back investment in the telco, despite ditching its listing on the Australian stock market.