某债券收益率为7.3%，修正久期为5.4，市场报价为98.5元，如果该债券的收益率降至7.1%，则该债券新的市场报价将为______。(答案取最接近值。)
A．97.66元
B．99.56元
C．103.83元
D．109.14元
参考答案：B
解析： 根据修正久期的定义，ΔP/P=-D*×Δy，债券价格变化率为-5.4×(-0.2%)=1.08%。因此，该债券的新价格为：1.0108×98.5=99.56元
| Every group has a culture, however uncivilized it may seem to us. To the professional anthropologist, there is no intrinsic superiority of one culture over another, just as to the professional linguist, there is no intrinsic hierarchy among languages. People once thought of the languages of backward groups as undeveloped. While it is possible that language in general began as a series of grunts and groans, it is a fact established by the study of "backward" languages that no spoken tongue answers that description today. Most languages of uncivilized groups are, by our most severe standards, extremely complex. They differ from Western languages not in their sound patterns or grammatical structures, which usually are fully adequate for all language needs, but only in their vocabularies, which reflect the objects and activities known to their speakers. Even in this aspect, two things are to be noted. First, all languages seem to possess the machinery for vocabulary expansion, either by putting together words already in existence or by borrowing them from other languages and adapting them to their own system. Second, the objects and activities requiring names and distinctions in "backward" languages, while different from the West, are often surprisingly numerous and complicated. A Western language distinguishes merely between two degrees of remoteness ("this" and "that"). But some languages of the American Indians distinguish between what is close to the speaker, or to the person addressed, or removed from both, or out of sight, or in the past, or in the future. |
All languages, whether civilized or not, have their own______.
A．ways to transfer ideas
B．forms to satisfy needs
C．abilities to answer description
D．systems to expand vocabulary