Under managed floating, a nation can alter the degree to which it intervenes in the foreign-exchange market. Heavier intervention moves the nation nearer to a fixed exchange-rate status, whereas less intervention moves the nation nearer to a floating exchange-rate status. Concerning day-to-day and week-to-week exchange-rate movements, a main objective of the floating guidelines has been to prevent the emergence of erratic fluctuations. Member nations should intervene in the foreign-exchange market as necessary to prevent sharp and disruptive exchange-rate fluctuations from day to day and week to week. Such a policy is known as leaning against the wind—intervening to reduce short-term fluctuations in exchange rates without attempting to adhere to any particular rate over the long term. Members should also not act aggressively with respect to their currency exchange rates; that is, they should not enhance the value when it is appreciating or depress the value when it is depreciating.