科学美国人60秒 SSS 2014-08-12
时间：2019-01-20 作者：英语课 分类：2014年Scientific American(八)月
英语课
This is Scientific Americans 60-Second Science. I am Christopher Intagliata. Got a minute?
Wanna know what the most popular movies, albums and video games are? Ask the internet. But don't Google it. Check what other people Googled. That's the theory behind Google Flu Trends—which crunches 1 search data to forecast flu prevalence. With admittedly mixed results.
Nevertheless, researchers have applied 2 the idea to the stock market. They found that when searches related to business and politics go up, the market tends to take a dive. Queries 3 for words like "election," "senate," and "CEO" are predictive of the downward trend—but not terms like "church," "earthquake" and "geometry."
Why the correlation 4? The researchers say investors 5 and the public may be more likely to search for information on business and government when they're concerned about the economy. And if confidence in the economy drops, so might stock prices. The findings appear in the Proceedings 6 of the National Academy of Sciences.
Over time, the correlation weakened—a sign that traders may already be using Internet search data in automated 7 trading algorithms.
"Generally speaking, if an opportunity like this is known, then the effect will diminish, and that's what we think we're seeing in the data we looked at, from 2004 to 2012." Lead author Chester Curme, a research fellow at the Warwick Business School.
And before you head over to Google Trends, he says, keep this in mind: "If somebody knows that other traders use this method, then a predatory trader could manipulate search volumes on Google artificially in order to deceive other traders." As they say in the biz: past performance does not guarantee future results.
Thanks for the minute, for Scientific Americans 60-Second Science. I am Christopher Intagliata.
n.（突发的）不足( crunch的名词复数 )；需要做出重要决策的困难时刻；紧要关头；嘎吱的响声v.嘎吱嘎吱地咬嚼( crunch的第三人称单数 )；嘎吱作响；（快速大量地）处理信息；数字捣弄
- I can't bear the way she crunches the sugar. 我简直看不惯她嚼糖的那副样子。 来自辞典例句
- Crunches with a twisting motion (to hit obliques) are excellent. 做仰卧起坐时加上转体动作更好。 来自互联网
adj.应用的；v.应用，适用
- She plans to take a course in applied linguistics.她打算学习应用语言学课程。
- This cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
n.问题( query的名词复数 )；疑问；询问；问号v.质疑，对…表示疑问( query的第三人称单数 )；询问
- Our assistants will be happy to answer your queries. 我们的助理很乐意回答诸位的问题。
- Her queries were rhetorical,and best ignored. 她的质问只不过是说说而已，最好不予理睬。 来自《简明英汉词典》
n.相互关系，相关，关连
- The second group of measurements had a high correlation with the first.第二组测量数据与第一组高度相关。
- A high correlation exists in America between education and economic position.教育和经济地位在美国有极密切的关系。
n.投资者，出资者( investor的名词复数 )
- a con man who bilked investors out of millions of dollars 诈取投资者几百万元的骗子
- a cash bonanza for investors 投资者的赚钱机会
n.进程，过程，议程；诉讼(程序)；公报
- He was released on bail pending committal proceedings. 他交保获释正在候审。
- to initiate legal proceedings against sb 对某人提起诉讼