Sept 6 (Reuters) - Rbc RY.TO
* Ceo says would expect mortgage growth to slow somewhat
* RBC ceo says 25 bps increase in rates will benefit retail business revenue by c$100 million in first year to upwards of C$300 million in 5 years
* RBC ceo says does not expect to require more capital if bank designated as g-sib
* RBC ceo says technology spend at elevated level, stressing operating leveage