Hedge funds are increasingly engaging in "basis trades," an arbitrage strategy that exploits small price differences between US Treasury bonds and their futures contracts. This involves shorting the future and buying the underlying bond, allowing for returns by leveraging tiny percentage point premiums. The scale of this activity has grown significantly, with short selling in key Treasury maturities reaching approximately $660 billion in underlying notional value, according to the Commodity Futures Trading Commission. While basis trading helps prevent large price discrepancies between futures and bonds, ensuring market efficiency and lower costs for US debt, its rapid growth and reliance on high leverage raise concerns among regulators.
Regulators, particularly the Securities and Exchange Commission (SEC), are concerned that the massive scale of basis trading could destabilize markets. They propose registering hedge funds as Treasury dealers, a move criticized by some, like Citadel CEO Ken Griffin, who argue for tougher scrutiny of banks instead. The SEC is also pushing for more Treasury bond deals by high-speed traders and hedge funds to go through clearing houses, aiming to add safeguards to the $24 trillion market. Currently, only 13% of Treasury transactions are centrally cleared, a significant drop from 25 years ago.
The fragility of the US government bond market has been a recurring concern, highlighted by events such as the "flash rally" in 2014, the 2019 repo market crisis, and the March 2020 market meltdown, which necessitated Federal Reserve intervention. Hedge funds' leveraged positions, when they backfire, have been implicated in creating volatility during these stress periods. While some argue that basis trades did not cause systemic collapse in 2020, they certainly exacerbated volatility. The core worry is that if basis trades go wrong, hedge funds might dump Treasuries en masse, triggering widespread market instability. This has led to calls for a closer examination of hedge funds and prime brokers, who are seen as symbiotically exploiting regulatory risks.
