美国 · 财经报刊 · The Wall Street Journal
The Extra-Strength Funds That Are Too Much of a Good Thing
A new kind of sector ETF concentrates even more of your money in the top stocks.
在 The Wall Street Journal 阅读全文 登录后可收藏MarketNews 仅展示媒体发布的标题和摘要，全文请在出版方网站阅读。 (www.wsj.com)
