For instance, Buffett urges the average investor to purchase index funds.

比如巴菲特曾建议普通投资者应该购买指数基金。

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The American PMI (Purchase Management Index) grew faster than expected, offering a positive note amid worries about the state of the economic recovery.

美国的采购经理人指数增长超过预期，这在经济复苏目前令人担忧的状况中给人带来了一个积极的音符。

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After deciding purchase policy, tactic, target and action plan, the enterprise should have the relative performance index for controlling the purchase process during implementing the plan.

作为企业，在制定采购方标、战略、目标及实现相应目标的行动计划后，在计划实施时还需有相应的绩效指标，用于对采购过程进行检查控制。

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While refinancing activity rose by 30% to its highest in two years inspired by a nine-month low for 30-year mortgage rates, the purchase index declined by 0.9%.

FORBES: Investors Misread The Fed

Even a seven-month low for 30-year mortgage loan rates failed to stimulate buyers with the purchase index falling by 1.4%, although some home owners took advantage by refinancing at lower rates.

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According to the MBA, as of the week ending June 3, 2011, mortgage loan applications, as measured by the seasonally adjusted Purchase Index, decreased by 4.4% over the course of the previous week and by 3% over the month of May.

FORBES: Mortgage Demand Wanes Despite Historically Low Interest Rates