- 阅读理解A
题干：Thankstoslumpingmarkets,investmentbanksaresheddingmanyoftheirhighly-paidtraders.Whenmarketsrecover,thebanksmightbetemptedtoreplacethemwithrathercheapertalent.Onealternativehasbeenaroundforawhilebuthasyettocatchon:autonomoustradingagents—computersprogrammedtoactlikethehumanversionwithoutsuchpeskycostsasholidays,lunchbreaksorbonuses.Programtradinghas,ofcourse,beendonebefore;someblamedthe1987stockmarketcrashoncomputersinstructedwithsimpledecision-makingrules.Butrobotscanbesmarterthanthat.DaveCliff,aresearcheratHewlett-PackardLaboratoriesinBristol,England,hasbeencreatingtradingrobotsforsevenyears.Incomputersimulationsheletsthemevolve"genetically",andsoallowsthemtoadaptandfitmodelsofreal-worldfinancialmarkets.Hisexperimentshavesuggestedthataredesignofsomemarketscouldleadtogreaterefficiency.Lastyear,aresearchgroupatIBMshowedthatMrCliff'sartificialtraderscouldconsistentlybeatthehumanvariety,invariouskindsofmarket.Nearlyalltaketheshapeofanauction.Onewell-knowntypeistheEnglishauction,familiartopatronsofthesalesroomsofChristie'sandSotheby's,wheresellerskeepmumontheirofferprice,andbuyersincreasetheirbidsbystagesuntilonlyoneremains.AttheotherextremeistheDutchauction,familiarto17th-centurytulip-tradersintheNetherlandsaswellastobiddersforAmericanTreasurybonds.Here,buyersremainsilent,andasellerreduceshispriceuntilitisaccepted.Mostmarketsforshares,commodities,foreignexchangeandderivativesareahybridofthesetwotypes:buyersandsellerscanannouncetheirbidorofferpricesatanytime,anddealsareconstantlybeingclosed,aso-called"continuousdoubleauction".MrCliff'snovelideawastoapplyhisevolutionarycomputerprogramstomarketplacesthemselves.Whynot,hethought,tryandseewhattypesofauctionwouldlettradersconvergemostquicklytowardsanequilibriumprice?Theresultsweresurprising.Inhismodels,auctionsthatletbuyersandsellersbidatanytimelikemostoftoday'sfinancialexchangeswerelessefficientthanonesthatrequiredrelativelymorebidsfromeitherbuyersorsellers.These"evolvedauctions"alsowithstoodbigmarketshocks,suchascrashesandpanics,betterthantoday'sreal-worldversions.MrCliff'smostrecentresults,whichwillbepresentedinSydney,Australia,onDecember10th,showthatthebesttypeofauctionforanymarketdependscruciallyonevenslightdifferencesinthenumberofbuyersandsellers.BankofAmericahasbeeninvestigatingthesenewauctions,alongwithrobotictraders,forpossibleuseinelectronicexchanges.Thehopeisthattoday'sfinancialauctionsandonlinemarketplacesmightworkbetterbybecomingmoreliketheirEnglishandDutchforebears.Butwhattocallsuchmulti-ethnichybrids?Here'sintroducingthe"Cliffhanger".
题目：Which of the following is true according to the text?（） - A 、David’s robot traders have now been used in real-world markets
- B 、Robot traders can evolve like creatures
- C 、There is room for improvement in efficiency in trading markets
- D 、The English auction is the most popular trading form
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参考答案【正确答案：C】
根据文章第二段，克里夫的研究表明“对某些市场进行重新设计可能会大幅提高效率。”可见交易市场仍然有提高效率的空间。
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