If one share costs $1, you can buy 10% of this share by investing just $0.10. You can invest any amount from 1c to whatever you want.
Auto-invest orders can also be placed for fractional shares in companies and exchange-traded funds (ETFs) listed on the NZ, Australian and US exchanges.
Please note: NZ Bonds cannot be held fractionally. They must be transferred and held in specific incremental amounts.