21.   U.S. officials warned Japan against relying on a weak yen to boost its exports as a way of sustaining the economic recovery.

22.   While weaker yen boosted shares of auto exporters, it raised concern that companies that depend on imports could suffer since they will have to pay more.

23.   A weaker yen boosts the value of profits Japanese exporters earned overseas when they are repatriated.

24.   A weaker yen generally boosts the earnings of exporters.

25.   A stronger yen boosts South Korean stocks because local exporters gain better price competitiveness against their Japanese rivals in the global market.

26.   A stronger yen boosts South Korean shares because local exporters will gain a price edge against their Japanese rivals in the global market.

27.   A weaker yen boosts Japanese exports by making them cheaper overseas, while foreign goods become more expensive in Japan.

28.   But that was good news for the stock market, where exporters rose on expectations the cheaper yen would boost their sales in overseas markets.

29.   But that was good news for shares of exporters, which rose in morning trading on expectations the cheaper yen would boost their sales in overseas markets.

30.   Electronics shares such as Sony Corp. and Canon climbed in early trading based on a notion that the weaker yen would boost their earnings.