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Structural Determinants of Hong Kong's Current Account Surplus

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  • Frank Leung

    (Research Department, Hong Kong Monetary Authority)

Abstract

Hong Kong as a city-state economy often records current account surplus. Empirical results show that the surplus is positively related to trade openness, terms of trade, volatility of output gap, the M2-to-GDP ratio and the non-service-sector-to-GDP ratio, and is negatively associated with the old-age dependency ratio. Among the explanatory variables, terms of trade and volatility of output gap play a predominate role in explaining movements in the current account balance. From a saving-investment point of view, the joint statistical significance of trade openness, terms of trade and volatility of output gap supports interpretation of Hong Kong's current account balance from the perspective of accumulation of net foreign assets. As a small and highly open economy, Hong Kong is specialised and subject to high income volatility in the face of terms of trade shocks and business cycle fluctuations, with relatively concentrated domestic investment opportunities. As a result, for income smoothing and risk diversification purposes, Hong Kong residents have accumulated substantial net foreign assets by running current account surpluses. From a trade-flow perspective, the shift in economic structure from manufacturing to service (as proxied by the decrease in the non-service-sector-to-GDP ratio) has deprived Hong Kong of a manufacturing base for exports, reducing the merchandise trade balance. Fortunately, this has been more than offset by the expansion of Hong Kong's role as a service centre for trade intermediation (as proxied by the increase in the trade openness ratio, which indicates increasing volume of trade flows being processed by Hong Kong) so that the overall current account has remained largely in surplus. Hong Kong's equilibrium current account surplus is estimated to be about 8.7% of GDP at present. Hong Kong's current account surplus is projected to average 4.4% of GDP over the next decade, smaller than the historical average surplus of 5.8% of GDP. This mainly reflects (1) more intense competition for intermediation of China trade from other Mainland cities (which reduces the pace of generation of external income through service exports), (2) an aging population (which reduces savings and hence the current account balance) and (3) a deterioration of terms of trade as a result of expected renminbi appreciation.

Suggested Citation

  • Frank Leung, 2006. "Structural Determinants of Hong Kong's Current Account Surplus," Working Papers 0614, Hong Kong Monetary Authority.
  • Handle: RePEc:hkg:wpaper:0614
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    File URL: http://www.info.gov.hk/hkma/eng/research/RM14-2006.pdf
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    Cited by:

    1. Genberg, Hans & He, Dong & Leung, Frank, 2007. "Recent Performance Of The Hong Kong Dollar Linked Exchange Rate System," MPRA Paper 9440, University Library of Munich, Germany.
    2. Frank Leung & Philip Ng, 2007. "Is the Hong Kong Dollar Real Exchange Rate Misaligned?," Working Papers 0721, Hong Kong Monetary Authority.
    3. Natalya Ketenci, 2010. "Major Determinants of Current Account in Russia," Transition Studies Review, Springer;Central Eastern European University Network (CEEUN), vol. 17(4), pages 790-806, December.

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