This paper examines whether China’s switch back and forth from fixed to floating exchange rates in 2005 and 2008 changed the contribution to stock price discovery by foreign and domestic investors. During that time, mainland investors could only trade the RMB-denominated A-shares in the domestic Shanghai and Shenzhen markets, while the dual-listed HKD-denominated H-shares were available only to overseas investors. Using intraday data on overlapping trading hours, we find that the switch from a fixed rate to managed floating in July 2005 increased the H-shares’ contribution to price discovery; while the exchange rate regime reversal in July 2008 allowed the domestic stocks to regain their dominance in information shares. These results imply that, in a market subject to restrictions on capital flows, a flexible exchange rate regime increases the propensity of investors to trade foreign-issued stocks to speculate on the RMB exchange rate, which raises overseas investors’ contribution to price discovery.

Vertical fragmentation of product value chain across borders is the driving force of growing economic interdependency in East Asia. A common currency, not flexible exchange rates between national currencies, would reduce flexibility in relative prices within East Asia. Its impact would be far greater for exports that have stronger production network linkage. In order to test the hypothesis, the paper estimates the effect of a common currency on China's processing and ordinary exports separately. The distinction is necessary because the processing exports, unlike the ordinary exports, are produced along the regional production networks, with final stages of assembly and exporting being increasingly concentrated in China. The short-run dynamics indicate that the effect on China's processing exports is more than double the corresponding effect on China's ordinary exports. The long-run effect on the processing exports of intra-regional RER flexibility, which is otherwise the lack of a regional currency, is almost nine times as large as the long-run effect of a unilateral RMB appreciation. By contrast, the corresponding long-run effect is statistically insignificant for the case of ordinary exports that are produced primarily by using local inputs. The long-run coefficient of this intra-regional RER flexibility implies that the actual volume of processing exports is 20 percent below the potential. The magnitudes of these effects are consistent with the hypothesis that a common currency would further integrate East Asian production networks and promote regional economic integration.

This paper sheds new light on the external and domestic dimension of China's exchange rate policy. It presents an open economy model to analyze both dimensions of macroeconomic adjustment in China under both flexible and fixed exchange rate regimes. The model-based results indicate that persistent current account surpluses in China cannot be rationalized, under general circumstances, by the occurrence of permanent technology or labor supply shocks. As a result, the understanding of the macroeconomic adjustment process in China requires to mimic the effects of potential inefficiencies, which induce the subdued response of domestic absorption to permanent income shocks causing thereby the observed positive unconditional correlation of trade balance and output. The paper argues that these inefficiencies can be potentially seen as a by-product of the fixed exchange rate regime, and can be approximated by a stochastic tax on domestic consumption or time varying transaction cost technology related to money holdings. Our results indicate that a fixed exchange regime with financial market distortions, as defined above, might induce negative effects on GDP growth in the medium-term compared to a more flexible exchange rate regime.

We extend the research of Michael Frenkel and christiane Nickel (2001) and present a modified Dornbusch overshoot model to study the impacts of different control degree of different capital on price-exchange rate system with a microstructure in foreign exchange market in the steady state. It is found that the impact on the stability of price-exchange rate system is an alternative choice between saddle stability and entire stability.