The Fed isn’t your biggest worry. The central-bank decision that actually impacts your 401(k) lands in Tokyo.

The article argues that the Bank of Japan, not the Federal Reserve, may be the bigger driver for U.S. markets and retirement portfolios. It says rising Japanese rates and a weaker yen are pushing Japanese investors and insurers to keep more capital at home instead of buying U.S. Treasuries. That could reduce demand for U.S. government bonds, lift long-term yields, and pressure bond prices and rate-sensitive assets such as long-duration bond funds, mortgages, and high-growth tech stocks. The piece frames this as a slow-moving but meaningful risk to 401(k) bond allocations and the broader 60/40 portfolio, while noting Japan has not dumped its Treasury holdings and that the scenario is still more warning than crisis. The market takeaway is that global yield dynamics and BOJ policy could tighten financial conditions in the U.S. even without Fed action.