Our policies will lift investment: PM

Prime Minister Malcolm Turnbull insists every policy his government took to the election is designed to promote investment.

"If you get more investment, if you get stronger confidence and confidence remains strong, then you will get more jobs," Mr Turnbull told reporters in Canberra on Wednesday.

In cutting the cash rate to a record low on Tuesday, Reserve Bank governor Glenn Stevens noted a "very large decline" in business investment.