CryptoWorld News: Goldman Sachs estimates that Japan used about 5 trillion yen for currency market intervention last week, and says policymakers could theoretically carry out about 30 more interventions of a similar scale. Goldman Sachs notes that Japan intervened when the yen-to-dollar exchange rate was above 160; although volatility was relatively low, it shows that authorities are setting their “red lines.” Goldman Sachs believes Japan’s Ministry of Finance is unlikely to use most of its foreign exchange reserves for intervention, and instead would carefully choose the most effective timing—such as when the yen depreciates rapidly. While the Japanese government has not yet made any official comment on whether it intervened last week, Goldman Sachs’s estimate shows that it is paying close attention to the market.