1.   An expanding surplus could push the dollar lower against the yen by sparking concerns U.S. authorities will put pressure on Japan to reduce its exports.

2.   Argentine stocks plunged after an unexpectedly strong U.S. jobs report sparked concern that rising interest rates would lure investors away from equities, particularly in emerging markets.

3.   Any signs inflation is picking up will spark further concerns that the Federal Reserve will move soon to lift official interest rates to stifle demand.

4.   Banks also fell as a sliding Canadian dollar sparked fresh concern that interest rates may rise soon.

5.   Bonds were sold briefly at the open as a stronger dollar sparked concern investors will flee yen-denominated assets.

6.   Bonds and bond futures also dropped from their highs as a falling stock market sparked concern that investors would pull money from U.S. investments.

7.   A bigger decline would have sparked concern of politicians calling for new government spending.

8.   A disappointing earnings report from Walt Disney Co. sparked concern that even shares of steady-growing consumer products companies could be vulnerable to profit shortfalls in coming months.

9.   A similar case recently reported in a boy in Japan sparked concern among health authorities worldwide.

10.   A rapid increase in interest rates could threaten gains in stocks by sparking concern over corporate profits.