Thanks for the reply alphman, my confusion comes from the following;
As I understand it the Banks make their profits in three main areas:
1/. Fees and charges on banking type transactions, borrowings, margins on Bank Bills etc.
2/. None core banking activities, such as insurance, online brokers, funds managers etc.
3/. The interest rate margin on lending. However the funds raised for this lending comes largely from funds deposited, both collectively from various types of customers operating/savings accounts and term deposits. The balance is from the money market.
An increase in the Reserve Bank's overnight cash rate does not unfavourably impact on any of the above.
In relation to 3/. above, term deposit rates are fixed for up to 5 years, rate increases are not passed on to savings accounts which pay next to nothing in interest and money market borrowing have up to 6 months before increasing further. On the other hand, all variable loans are increased, and fixed loans are hedged.
Borrowings from the RB at the overnight cash rate are minor in comparison and are only used to finance daily settlements in exchanges between banks.
No doubt I will be wrong somewhere along the line because banks' always dip on rate rises, but I fail to see how the flow on effect from the RB interest rate rises impacts on the banks profits.