The US Treasury market
The US Treasury market is the world's largest and most liquid bond market, with over $25 trillion in outstanding debt and daily trading volumes exceeding $800 billion. It's the benchmark for global fixed income — the risk-free rate from which every other credit instrument is priced.
The primary market (new Treasury issuance) runs through regular auctions: 4-week, 8-week, 13-week, 26-week, and 52-week T-bills; 2-year, 3-year, 5-year, 7-year, and 10-year notes; 20-year and 30-year bonds. Auction results — specifically how strong foreign demand is (indirect bidders) and how the yield compares to when-issued pricing — move markets.
Weak Treasury auctions (poor bid-to-cover ratios, high tail — when the auction clears at a yield above when-issued) signal that demand for US debt is insufficient at current yields. This causes yields to rise (prices fall), which in turn pressures equities through the discount rate mechanism.
The 10-year Treasury yield is the most important rate in global finance. Mortgages, corporate bonds, and equity discount rates all move with it. When traders talk about "rates" or "the risk-free rate," they typically mean the 10-year. Monitoring the 10-year yield is non-negotiable for any macro-aware trader.
TLT and Treasury ETFs
TLT (iShares 20+ Year Treasury Bond ETF) is the most liquid long-duration Treasury instrument for equity market participants. It tracks the price of 20-30 year Treasury bonds and has significant daily volume. When rates fall, TLT rises sharply (high duration). When rates rise, TLT falls — in 2022, TLT lost over 30% as yields surged.
IEF (7-10 year) and SHY (1-3 year) provide intermediate and short-duration exposure. The ratio of TLT to SHY (long to short duration) is a practical way to express a view on the yield curve steepness. TLT/SHY rising means long rates falling faster than short rates (bull steepening or flattening); falling means the opposite.
TIPS ETFs (TIP, SCHP) hold inflation-protected Treasuries, where the principal adjusts with CPI. TIPS yields are real yields (nominal minus inflation expectation). When real yields fall (inflation expectations rise faster than nominal rates), TIPS outperform nominal Treasuries and gold typically rallies simultaneously.
Treasury market dynamics
The Federal Reserve conducts monetary policy by targeting the federal funds rate and, in quantitative easing cycles, by purchasing Treasuries in the secondary market. Large Fed balance sheet expansion (QE) injects liquidity and suppresses yields. Balance sheet reduction (QT) removes that liquidity and allows yields to rise.
Foreign central bank purchases are another major driver. Japan and China have historically been the largest foreign holders of US Treasuries. Shifts in their purchase programs — whether driven by currency defense, diplomatic tensions, or domestic policy — affect Treasury demand and yields.
The fiscal deficit determines Treasury supply. Large deficits require large issuance. In 2023, significant Treasury supply (needed to fund the large fiscal deficit) combined with QT from the Fed pushed long yields higher even as the economy remained resilient — a supply-side pressure on the market distinct from economic expectations.