The World's Most Controversial Interest Rate Is Haunting Us Again

Episode Summary

Executive Summary: The episode explains LIBOR’s origins, its manipulation during the financial crisis, and why it still matters despite efforts to replace it. Guest Scott Peng argues LIBOR remains deeply embedded in markets, that its recent rise reflects not just Fed expectations but Treasury bill supply and credit-market shifts, and that the proposed replacement SOFR is a poor fit versus a market-driven benchmark like T-bills.

Main Topics: LIBOR’s origin and rise to benchmark status (Priority: 5/5): Peng explains LIBOR emerged in the mid-1980s for non-U.S. banks in the Eurodollar market and gradually replaced Treasury bills as the dominant short-term benchmark through use in swaps and broader banking practices. 2008 crisis-era LIBOR blowout and manipulation (Priority: 5/5): The discussion covers how LIBOR rose during the financial crisis, how public submission data created incentives to understate borrowing costs, and how trader influence and reputational concerns distorted the benchmark. Why LIBOR matters to everyday finance (Priority: 5/5): The hosts and guest stress that LIBOR is embedded in swaps, loans, mortgages, and student debt, making its integrity and future replacement crucial for the financial system. Recent rise in LIBOR and its drivers (Priority: 5/5): Peng argues the recent increase in three-month LIBOR is partly due to anticipated Fed hikes, but also materially affected by increased Treasury bill supply and a smaller credit-risk component. Tax reform, Treasury supply, and money-market effects (Priority: 4/5): The episode connects tax reform and repatriation flows to changes in commercial paper maturity and Treasury financing needs, which in turn influence short-term rates and LIBOR. Debate over LIBOR replacement rates (Priority: 5/5): Peng criticizes the government-backed SOFR benchmark as a securitized overnight rate that cannot truly replace LIBOR, and instead favors Treasury bill-based benchmarks and market-driven adoption. Transition risk and the persistence of LIBOR (Priority: 4/5): Despite official plans to phase LIBOR out, Peng says the benchmark remains dominant in swaps and that a transition to a new reference rate will take years and require broad institutional coordination.

Key Arguments: LIBOR became dominant not by fiat but through network effects and widespread market adoption across assets and liabilities. During the financial crisis, public disclosure of bank submissions created incentives to understate actual funding costs, both to protect reputation and to benefit trading books. LIBOR is central to hundreds of trillions of dollars in contracts, so even modest changes in its level have broad financial consequences. The recent rise in LIBOR is only partly explained by expected Fed hikes; Treasury bill supply and credit-market dynamics account for much of the rest. Tax reform affected short-term funding markets by altering repatriation behavior and shortening commercial paper maturities, which fed into LIBOR. SOFR is not a true substitute for LIBOR because it is an overnight, secured borrowing rate, whereas LIBOR reflects unsecured term lending. A Treasury bill benchmark would be more transparent and more naturally suited to market adoption than a benchmark imposed by regulators. The market transition away from LIBOR will be slow because derivatives clearing, accounting rules, and benchmark conventions all need to align.

Data Points: LIBOR rise since end of 2017: more than half a percent - Scott Peng describes the increase in three-month LIBOR despite no Fed rate hike over the same period. Fed-hike attribution to LIBOR rise: about 58% - Peng attributes roughly 58% of the rise to market pricing of future Fed hikes via OIS. Treasury bill yield increase: 37 basis points - Three-month Treasury bill yields rose this amount since the end of the year in Peng’s decomposition. Residual from Treasury supply: 13 basis points - After subtracting the OIS-implied move, Peng attributes this part of the Treasury bill rise to increased bill supply. Credit-market component: 8 basis points - Peng estimates this as the remaining difference between Treasury bills and 90-day financial commercial paper. Combined Treasury bill and credit component: roughly 25 basis points - Peng says the non-Fed portion of LIBOR’s increase adds up to about one Fed hike. Three-month OIS contribution: 24 basis points - Used as the bottom layer of his decomposition of the LIBOR rise. Commercial paper maturity share: from low 50s to mid-60% - Credit Suisse research cited by Peng shows the share of the CP market with maturities six weeks or shorter increased after tax reform. LIBOR submission banks: 16 banks - Peng describes the pre-crisis LIBOR-setting panel structure. Trimming methodology: top 4 and bottom 4 removed - The British Bankers’ Association excluded the four highest and four lowest submissions before averaging the rest. Swaps referencing LIBOR: hundreds of trillions of notionals - Peng emphasizes the enormous scale of interest rate swaps tied to LIBOR. Share of daily swaps still in LIBOR: well over 90% - Peng says most swaps traded in a single day were still based on LIBOR years after the scandal. SOFR publishing timeline: April - Peng says the Fed only will start publishing SOFR in April. Transition deadline: 2020-2021 - Regulators’ timetable for LIBOR elimination is described as ambitious. Weekly Treasury bill sale example: 50 billion - Peng mentions a recent weekly 13-week Treasury bill sale of 50 billion and notes the market could support more volume.

Pivotal Quotes: "Rumors of its death, as we'll discuss, are somewhat greatly exaggerated." — Scott Peng: Peng argues LIBOR is not really dead because it remains deeply embedded in market pricing and trading. "The market kind of gravitated towards that." — Scott Peng: He explains that LIBOR emerged organically through usage rather than government mandate, supporting his case against a fiat replacement. "I think creating a benchmark by fiat is something that is going to have difficulty working." — Scott Peng: Peng criticizes the attempt to impose SOFR as the replacement benchmark.

Implications: LIBOR remains systemically important despite reform efforts. Investors, borrowers, and policymakers should expect a long, messy transition, with benchmark choice affecting funding costs, derivatives, and market liquidity.