来自《耶鲁大学开放课程：金融市场 第22集 第22集》
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that's because it's a monthly index.因为这是一个以月为时间单位的指数 -
We only publish it every month,我们一个月公布一次 -
but you can see that it's been smooth.但你们可以看到它一直都很平缓 -
It was increasing until直到我们开始做期货市场的时候 -
around the time we started the futures market房价才开始上涨 -
and then it's been declining at an accelerating rate.之后便加速下跌 -
We are now down in real terms而如今全国的房价 -
about 15% nationwide on home prices,与2006年初时的峰值相比 -
which peaked in early 2006.差不多实际下跌了15%左右 -
This is the futures price that we've had这是房价的期货价格 -
and that's for the closest futures contract--是最近的期货合约价格 -
the nearest to expiration.就快要到期的合约