We are in crisis time ... should we buy now?Any suggestion?Next, today's Reuters news ... New York - The Yen fell against the dollar and the euro after the Federal Reserve of the United States. UU. Inject liquidity into the banking system three times, reducing losses in the marketsstock market and calm the nerves of financial investors.The global central banks, including the European Central Bank and the Bank of Japan, added more than $ 301 billion to the financial system in the last 48 hours to stabilize credit markets."The central banks such as the FED and the ECB are injecting liquidity, which has done a lot to calm the markets," said Rafael Martorell, the main BNP Paribas operator in New York.This helped US actions recover from an early fall, which led the currency operators to sell the Yen that they had just acquired.Lately, the YEN has fallen when the markets of shares rise, since investors take advantage of the low interest of the YEN to finance purchases of more risky assets.When the shares fall, the YEN is strengthened because investors undo these operations and buy yen again.In the last New York operations, the dollar rose 0.3 % to 118.49 yen, more than 1 and above a minimum headdress previously in the session.The dollar also rose 0.2 % against the Swiss Franco, reaching 1,1970 francs.The euro rose 0.2 % against the dollar, to $ 1,3698, although below its historical maximum of $ 1,3860 reached last month.In front of Yen, the euro advanced 0.45 %, standing at 162.31 yen.** International credit concerns dominate the market ** The crisis, which began with losses in the subprime mortgage market in the US, has caused a global flight to safer assets.The actions fell, the government bonds shot and the expectations of increases in interest rates by the central banks were moderated.On Friday, the FED injected $ 39 billion into the banking system through three operations, and claimed to be ready to provide more funds if necessary, marking the first support signal of the Central Bank from the attacks of September 11, 2001.Despite the actions of the Fed, two of the three main stock market indices of the USA. UU. They ended the day down.The Dow Jones industrial average fell 0.23 %, recovering something from minimums intradicted more than 2 % below the opening.Although the actions continued weak, the Yen failed to recover ground."Participants in the currency market are adjusting positions," said Samarjit Shankar, director of Global Strategy at Bank of New York Mellon."We are seeing some decoupling between the positions in shares and currencies when approaching the weekend."Despite the volatile movements of the day, Shankar anticipated more profits for Yen next week."If the actions remain under pressure, the YEN is likely to be strengthened due to greater risk aversion and concerns about liquidity," he added.On Friday, the federal fund rate rose up to 6 %, well above the objective of the Fed of 5.25 %, which led the Central Bank to inject temporary reserves into the banking system.Short -term interest rates in the euro zone and in the US.The problems in the credit market have led operators to anticipate a reduction of a quarter quarter in the Fed rates for next month.In addition, the chances of the ECB rise next month have fallen below 50 %, compared to 70 % probabilities at the beginning of the week.Meanwhile, the expectations that the Bank of Japan hardens its monetary policy this month have fallen to one in three, compared to the previous 75 %.