1.   Avoid sudden fluctuations in water temperature.

2.   Companies repurchase shares to control sudden fluctuations in stock prices.

3.   The Bangko Sentral ng Pilipinas, the central monetary authority, has resisted intervening in the foreign exchange market except to smooth sudden fluctuations.

4.   The potential enemy that China worries about most is the United States, and relations with that country have become as prone to sudden fluctuations as world oil prices.

5.   They also use buybacks to control sudden fluctuations in stock prices.