It’s a truly extraordinary time in the financial markets and the economy as a whole, and AIB’s third quarter trading update offers a window into what’s going on. AIB is coming off the back of a good two years. The share price has almost tripled since October 2020 — mainly due to rising interest rates.  When interest rates in the economy rise, banks benefit because it means they can charge borrowers more in interest. It means they have to pay more to depositors too, but in practice they make more from lenders than they pay to depositors.  At first, in…