The Treasury Department intervened to help stabilize the Japanese yen, marking the first U.S. purchase of the currency since 1998. Washington has a vested interest in supporting the yen, as Japan remains the largest foreign holder of U.S. government securities.

The Federal Open Market Committee raised their target interest rate range by 25 basis points to 3.75-4% on September 16th due to continued inflationary pressures. Fed officials are now projecting one more hike of 25 bps in 2026. (Source: U.S. Treasury)

Better-than-expected earnings from many U.S. companies, combined with steady economic growth, helped offset some market volatility and supported sectors such as manufacturing and energy.

For the second consecutive month, mid-cap and small-cap stocks underperformed their large-cap counterparts, a pattern that has historically accompanied rising interest rates. Borrowing costs for smaller companies tend to increase as rates rise, while larger firms are generally less affected because of stronger balance sheets and greater cash flow. (Sources: S&P, Bloomberg)

The challenge for the federal government is the cost of servicing its $40 trillion debt load, which now exceeds $1 trillion annually in interest payments. A fiscal deficit of roughly $2 trillion continues to add to the burden, as government spending far outpaces revenue. To finance the shortfall, the Treasury issues and sells additional bonds to investors.

In the private sector, U.S. companies have launched a major borrowing campaign to fund nearly $800 billion in infrastructure investments tied to the nationwide expansion of AI capabilities. Like the federal government, these companies rely on bond issuance to finance substantial capital expenditures.

Capital markets bring together borrowers and investors, creating competition for available funding as both corporations and the government seek to raise capital through bond sales. As the supply of bonds increases, borrowing costs tend to rise for both issuers, putting upward pressure on interest rates across the economy. (Sources: Treasury Dept., Congressional Budget Office)

In theory, AI could make U.S. workers more productive and efficient, potentially accelerating economic growth and enabling both employees and businesses to generate higher incomes without fueling inflation. Conversely, if companies determine that replacing workers with AI is a more effective way to increase profits, the result could be fewer employment opportunities and greater downward pressure on wages. (Sources: Labor Dept., BLS)

Conversely, Medicare beneficiaries who experience a reduction in income may request a recalculation to qualify for a lower IRMAA surcharge and reduced Medicare premiums. One-time income events, such as the realization of significant capital gains, can also increase MAGI and result in higher Medicare premium surcharges. (Sources: Social Security Administration)