On Friday, the Bank of Japan raised interest rates as widely expected, and in doing so, set in motion the quiet machinery of global market recalibration. Stocks rose, oil fell, and the yen — counterintuitively — weakened, as traders weighed not just what the BOJ did, but what it signaled about the limits of Japan's tolerance for tighter money. In the larger story of monetary policy divergence, this moment captures a world still searching for equilibrium between growth, inflation, and the cost of borrowing.