Buying them tends to push up the price; that tends to influence the yield down so it encourages a lower level of interest rate.

买进它们，导致价格上升；,导致参数降低,所以它鼓励一个低的利率水平。

耶鲁公开课 - 金融市场课程节选

While the number of women seeking angel capital is low, the percentage that received angel investments (25%) is above the market yield rate and these data indicate that when women do seek angel capital they lead the market yield rate by 4%.

FORBES: Tipping The Scales: Women Angel Investing Reaches All-Time High

Hon Hai Chairman Terry Gou said last month that the yield rate of Apple's touch-screen devices hasn't been satisfactory and has hurt its profitability.

WSJ: Apple Preparing For New iPhone in Third Quarter

"Suppliers will ramp up production and try to improve the yield rate for the new iPad in the fourth quarter before its official launch in early 2012, " said a person at the supplier.

WSJ: Apple Developing New iPad