The Reserve Bank will increase interest rates on Tuesday for the fourth time this year, and what's more, it will be a "hawkish hike" — that is, with suggestions of more to come.But there are now three new factors entirely outside the bank's control that are pulling in different directions:A new front has opened in the Iran war with dire American threats of escalation;AI autonomy, and therefore productivity, might now be curtailed;Migration will be reduced.The first will tend to increase inflation and therefore push interest rates higher — though it's likely to be short-term — while the second and third…