LIBOR

LIBOR. The London Interbank Offered Rate was a globally critical benchmark interest rate, administered from the City of London. It represented the average rate at which major global banks could borrow unsecured funds from one another in the London interbank market. For decades, it served as the primary reference rate for an immense volume of financial instruments worldwide, from derivatives to corporate loans. Its phase-out, completed in mid-2023, marked the end of a foundational era in global finance.

Overview

This benchmark was integral to the functioning of the international monetary system, underpinning contracts worth hundreds of trillions of United States dollars. It was quoted for five major currencies—the United States dollar, the euro, the pound sterling, the Japanese yen, and the Swiss franc—and across seven different maturities, from overnight to one year. The rate was intended to reflect the cost of borrowing in the wholesale funding market between institutions of high credit quality. Its pervasive use made it a cornerstone for pricing everything from complex interest rate swaps traded on the Chicago Mercantile Exchange to everyday mortgages and student loans. The governance of the rate fell under the purview of the Financial Conduct Authority in the United Kingdom.

Calculation and publication

Historically, the rate was determined through a daily survey of a panel of major international banks, asking at what rate they could borrow funds. This panel was curated by the ICE Benchmark Administration, which succeeded the British Bankers' Association in its administration role. Each contributing bank submitted its estimate to Thomson Reuters, which acted as the calculation agent. The final published figure was calculated using a trimmed arithmetic mean, discarding the highest and lowest quartiles of submissions. This process occurred around 11:55 GMT each London business day. The underlying market it sought to measure—the unsecured interbank term deposit market—experienced severe structural decline following the 2007–2008 financial crisis, leading to a scarcity of actual transactions and increased reliance on expert judgment.

Historical context and transition

The benchmark's origins trace back to the early 1980s, with its formalization often credited to figures like Minos Zombanakis. It rose to prominence as the eurodollar market expanded, becoming the standard for syndicated loans and the burgeoning derivatives market. The financial crisis of 2007–2008 exposed fundamental weaknesses, as the collapse of Lehman Brothers caused interbank lending to freeze, making submissions increasingly theoretical. In 2017, Andrew Bailey, then Chief Executive of the Financial Conduct Authority, announced the intended cessation, triggering a global transition to more robust alternative reference rates. This monumental shift, coordinated by the Alternative Reference Rates Committee in the United States and the Working Group on Sterling Risk-Free Reference Rates in the United Kingdom, culminated in its final publication on June 30, 2023.

Scandals and legal issues

The benchmark's reputation was irrevocably damaged by a massive, multi-year manipulation scandal uncovered in the early 2010s. Investigations by regulators including the U.S. Commodity Futures Trading Commission, the U.S. Department of Justice, and the Serious Fraud Office in the United Kingdom revealed that traders at several banks, including Barclays, UBS, and The Royal Bank of Scotland, had colluded to submit false rates to profit their trading books. This led to unprecedented fines, criminal convictions for individuals like Tom Hayes, and sweeping reforms to its governance. The scandal prompted a major review by the Financial Stability Board and ultimately fueled the decisive push for its replacement with transaction-based risk-free rates.

Impact and legacy

The cessation has had a profound impact on global financial markets, requiring the remediation of millions of legacy contracts and the adoption of new standards. Its legacy is dual-natured: it was a vital piece of market infrastructure that facilitated global capital flows for a generation, but its vulnerabilities and the associated misconduct severely undermined trust in financial benchmarks. The transition has accelerated the adoption of rates like the Secured Overnight Financing Rate in New York and the Sterling Overnight Index Average in London, which are based on deep, liquid overnight markets. The episode stands as a pivotal case study in financial regulation, leading to stricter global standards under the International Organization of Securities Commissions and reshaping the architecture of modern finance.

Category:Financial benchmarks Category:London Category:Financial scandals