I have a running thread on KMX and one thing that is relevant for Berkshire or any auto insurance company is used car price. This directly impacts the price insurance companies pays and the cost of vehicle repair. After couple of years of red-hot price raises, I am expecting the prices to drop, actually drop significantly. While insurance premium takes some time to come down and creating a window of higher profitability.
For Berkshire this will result in higher profit at GEICO, but it is more relevant for someone like progressive.