琳达接受了伊森的股票投资建议后,另外一种理财产品——指数基金又跃入她的眼中。听朋友史密斯先生说,指数基金投资好,只要买指数就行了。她还是有些拿不准,很想了解有关指数投资的知识。琳达又一次来拜访了伊森。琳达(以下简称琳):非常感谢您上次告诉我有关长期投资的建议,最近我听说很多人在做指数投资,每天在报纸上电视上,我都会看到道琼斯指数、标准普尔指数等,上升了或者下降了,指数也能做投资,也能在市场上买卖么? Linda accepted Ethan’s stock investment advice, another kind of financial products - index funds leap into her eyes again. Listen to friend Mr. Smith said that index fund investment is good, just buy the index on the line. She was still not sure about it and would like to know more about the investment in the index. Linda visited Ethan again. Linda: Thank you very much for the last time you told me about the long-term investment proposal. Recently I heard that many people are investing in the index. I read the Dow Jones index and the S & P index every day on the newspaper , Up or down, the index can do the investment, but also in the market trading it?