再次友情提醒：双倍正反指不易长期持有

foolProf

今天 Ultrashort Material (-2x) SMN 再创52周新底 (~$34.5), 而相应的Ultra Material (＋2x) UYM 在(~$89)(52周新高 = $110), Material XLB (1x) 在(~$42) (52周新高 = $44.14). 石油有类似情况： XLE (1x. now = ~$77.7; 52wk high = $80.75), DIG (+2x. now = ~$96.6; 52wk high =$121.48), DUG (-2x. now = $35.5; 52wk low = $34.69). 

初学者园地

原帖由 foolProf 于 2008-4-4 11:15 发表 今天 Ultrashort Material (-2x) SMN 再创52周新底 (~$34.5), 而相应的Ultra Material (＋2x) UYM 在(~$89)(52周新高 = $110), Material XLB (1x) 在(~$42) (52周新高 = $44.14). 石油有类似情况： XLE (1x. now = ~ ...

谢谢你的提醒。
上次你已经指出了我对ETFs的一些不正确的理解，对我很有帮助，谢谢。
现在我用ETFs只是作Swing Trade。

CoolMax

能说详细一点吗？

foolProf

Cannot find previous post. Simple math:
$1000: 1st Day DIA up 10% = $1100; DDM = $1200; DXD = $800; Then 2nd Day DIA down 10% = $1100 x 0.9 = $990 (lost 1%); DDM = $960 (-4%); DXD = $800 x 1.2 = $960 (-4%).

That's why you see SMN or DUG hits 52wk low today, while other XLB/XLE or UYM/DIG didn't hit 52wk high.

Short term (1-2 wks) perfectly fine.

foolProf

Prediction: All these UltraShort funds will be lower and lower (to pennies), because of the math and anticipated uptrends of all sectors as well as inflation.

纽约的鱼

今天最有意义的一个贴。大顶。

大泡泡

又学一招.