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What is the Thai Overnight Repurchase Rate (THOR)?

In the realm of finance and banking, various interest rates play a crucial role in shaping economic activities. One such rate is the Thai Overnight Repurchase Rate (THOR), which is an essential component of Thailand’s financial system.

Before delving into THOR specifically, it is essential to grasp the concept of repurchase rates. Repurchase agreements, also known as repos, involve the sale of securities with a simultaneous agreement to repurchase them at a later date. Repurchase rates represent the interest rates charged in these transactions, reflecting the cost of borrowing for market participants.

Overview of Thai Overnight Repurchase Rate (THOR)

THOR is an overnight interest rate that serves as a benchmark for short-term borrowing and lending in the Thai money market. It represents the average interest rate at which banks and financial institutions borrow or lend funds overnight using government securities as collateral.

Importance of THOR

THOR plays a crucial role in the Thai financial system. It serves as a key reference rate for various financial transactions, including short-term loans, derivatives pricing, and interest rate swaps. The stability and reliability of THOR are vital for maintaining liquidity, managing monetary policy, and fostering confidence in the financial markets.

Factors Affecting THOR

Several factors influence THOR. The monetary policy decisions of the central bank, such as changes in the policy interest rate, can directly impact THOR. Additionally, market demand and supply dynamics, economic conditions, inflation expectations, and global interest rate trends can all contribute to fluctuations in THOR.

Calculation & Publication

The calculation and publication of THOR are overseen by the Bank of Thailand (BOT), the country’s central bank. The BOT surveys a panel of banks and financial institutions to gather data on overnight borrowing and lending rates. Using this data, the BOT calculates the weighted average of the rates to determine THOR, which is then published on a daily basis.

THOR vs. Other Interest Rates

The cessation of USD LIBOR had an impact on the Thai financial market, the Thai Baht Interest Rate Fixing (“THBFIX”), which was used in derivatives, notes and loans as well as for mark-to-market valuations, used USD LIBOR as a component for calculation.

THOR differs from other interest rates, such as the policy interest rate or interbank rates, as it specifically focuses on overnight borrowing and lending transactions. While the policy interest rate influences the broader economy, THOR is more reflective of short-term liquidity conditions and serves as a benchmark for short-term financing.

Impact of THOR on Financial Markets

THOR has a significant impact on various segments of the financial markets. Changes in THOR can influence borrowing costs, credit availability, and investment decisions. Moreover, fluctuations in THOR can affect bond yields, foreign exchange rates, and equity markets, making it crucial for investors and market participants to monitor and analyse THOR movements.

THOR as a Monetary Policy Tool

As a key policy rate, THOR provides the central bank with a tool to manage monetary policy. By adjusting THOR, the central bank can influence borrowing costs, liquidity conditions, and economic growth. Raising THOR can help curb inflationary pressures, while lowering it can stimulate economic activity and encourage borrowing.

THOR in the Global Economy

In the context of the global economy, THOR holds significance as it represents the borrowing and lending rates within the Thai financial system. THOR, along with other interest rates in different countries, contributes to the overall stability and interconnectedness of the global financial landscape.

THOR and Investors

For investors, THOR serves as a valuable indicator of short-term market conditions. It influences the pricing and performance of various financial instruments, including bonds, money market funds, and short-term investment products. Investors closely monitor THOR to assess risk and make informed investment decisions.


While THOR is an essential part of the financial system, it is not without risks. Sharp fluctuations in THOR can lead to market instability, liquidity challenges, and increased borrowing costs. Market participants need to closely manage these risks and develop strategies to mitigate their impact on financial portfolios.

THOR in Comparison to Other Overnight Rates

When comparing THOR to other overnight rates globally, variations in methodologies and underlying market dynamics become evident. Understanding the differences between THOR and similar rates in different countries can provide insights into the unique characteristics of the Thai financial system.


Thai Overnight Repurchase Rate (THOR) serves as a vital benchmark in the Thai financial system. Its role in determining short-term borrowing costs, influencing monetary policy decisions, and impacting financial markets makes it a critical indicator for investors, policymakers, and market participants. Monitoring THOR and its trends enables a deeper understanding of the Thai money market’s dynamics and its connection to the broader economy.

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