What is the Hong Kong Overnight Index Average (HONIA)?

HONIA is administered by the Hong Kong Monetary Authority (HKMA) and plays a critical role in the region’s financial markets, providing transparency and consistency for overnight funding rates.

Unlike the Hong Kong Interbank Offered Rate (HIBOR), which is a term rate based on interbank borrowing for longer periods, HONIA focuses exclusively on actual overnight transactions. It is often used as a reference rate in financial products and risk management strategies, particularly for those requiring short-term benchmarks.

How is HONIA Calculated?

HONIA is calculated daily using data from overnight interbank transactions. The process is as follows:

1. Data Collection: The HKMA gathers data from banks on all eligible overnight unsecured lending transactions conducted in the interbank market.
2. Volume-Weighted Average: The rate is computed as a volume-weighted average of these transactions, ensuring it reflects actual market activity.
3. Exclusions: Certain outlier transactions may be excluded to ensure the rate’s accuracy and robustness.

The result is a reliable, transparent, and market-driven benchmark that accurately reflects short-term borrowing costs in Hong Kong.

Why is HONIA Important?

HONIA plays a crucial role in Hong Kong’s financial markets for several reasons:

• Reference Rate: HONIA serves as a benchmark for short-term lending and borrowing rates in Hong Kong, particularly for financial products like overnight loans and derivatives.
• Market Stability: By reflecting actual overnight market activity, HONIA provides transparency, helping market participants assess liquidity conditions.
• LIBOR Transition: HONIA has gained significance as global financial markets transition away from LIBOR (London Interbank Offered Rate) to more transaction-based benchmarks.

Applications

HONIA is widely used across financial markets in Hong Kong and beyond:

1. Overnight Funding: Banks and financial institutions use HONIA to benchmark overnight borrowing and lending costs.
2. Derivatives: HONIA is referenced in certain financial derivatives, such as interest rate swaps, to manage short-term rate exposure.
3. Risk Management: Financial institutions utilise HONIA in assessing and hedging against overnight interest rate risks.

Difference Between HONIA and HIBOR

Historical Context and LIBOR Transition

HONIA has gained prominence in recent years as part of the global shift away from LIBOR towards alternative risk-free rates (RFRs). LIBOR’s reliance on estimated interbank rates raised concerns about its reliability and susceptibility to manipulation. As a transaction-based benchmark, HONIA aligns with international best practices, ensuring accuracy and resilience. There are no plans to remove HIBOR at this time.

The HKMA has encouraged the adoption of HONIA for financial products to ensure Hong Kong’s financial system remains aligned with global standards. This transition supports the development of robust and transparent financial markets in the region.

Conclusion

HONIA is a critical benchmark in Hong Kong’s financial markets, reflecting the cost of overnight unsecured interbank lending. Its transaction-based methodology ensures transparency, making it a reliable reference rate for various financial products and risk management strategies. As global markets continue transitioning to risk-free rates, HONIA’s importance in the region is expected to grow.