What Works on Wall Street A Guide to the Best-Performing Investment Strategies ofAl1 TIme James P. O'Shaughnessy McGraw-Hill NewYork SanFrancisco Washington,D.C. Auckland Bogota Caracas Lisbon London Madrid MexicoCity Milan Montreal NewDelhi SanJuan Singapore Sydney Tokyo Toronto LibraryofCongressCataloging-in-PublicationData O'Shaughnessy,JamesP. WhatworksonWallStreet : aguidetothebest-performinginvestmentstrategies ofalltime / JamesP.O'Shaughnessy. p. em. Includesbibliographicalreferencesandindex. ISBN0-07-047985-2 1. Investments-UnitedStates. 2. Investmentanalysis-UnitedStates. I. Title. HG4910.0828 1996 332.6-dc20 96-20365 CIP McGraw-Hill iZ ADivisionofTheMcGraw·HiUCompanies Copyright © 1997 by James P. O'Shaughnessy. All rights reserved. PrintedintheUnited StatesofAmerica.Exceptaspermittedunderthe UnitedStatesCopyrightActof1976,nopartofthispublicationmaybe reproduced ordistributed inanyform orbyany means, orstoredina databaseorretrievalsystem,withoutthepriorwrittenpermissionofthe publisher. 4 5 6 7 8 9 0 DOC/DOC 9 0 1 0 9 8 7 6 ISBN0-07-047985-2 ThesponsoringeditorforthisbookwasDavidConti,theeditingsupervisorwas PatriciaV.Amoroso,andtheproductionsupervisorwasSuzanneRapcavage.It wassetinPalatinobyReneeLiptonofMcGraw-Hill'sProfessionalBookGroup compositionunit. Printed~ndboundbyR.R. Donnelley&SonsCompany. Thispublicationisdesignedtoprovideaccurateandauthoritativeinformation inregardtothesubjectmattercovered.Itissoldwiththeunderstandingthatthe publisherisnotengagedinrenderinglegal,accounting,orotherprofessional service.Iflegaladviceorotherexpertassistanceisrequired,theservicesofa competentprofessionalpersonshouldbesought. . -Fromadeclarationofprinciplesjointlyadoptedbyacommittee oftheAmericanBarAssociationandacommitteeofpublishers. Thisbookisprintedonrecycled,acid-freepapercontaininga minimumof50% recycledde-inkedfiber. McGraw-Hillbooksareavailableatspecialquantitydiscountstouseas premiums and sales promotions, or for use in corporate training pro grams.Formoreinformation,pleasewritetotheDirectorofSpecialSales, McGraw-Hill, 11West19thStreet,NewYork,NY10011.Orcontactyour localbookstore. To Lael, Kathryn, Patrick,. andMelissa Waitfor the wisest ofall counselors, Time. -Pericles Contents Preface xv Acknowledgments xix 1. Stock Investment Strategies: Different Methods, SilDDar Goals 1 TraditionalActiveManagementDoesn'tWork 2 What's the Problem? 5 StudyingtheWrongThings 5 WhyIndexingWorks 6 PinpointingPerformance 6 DisciplineIs the Key 8 ConsistencyWins 8 AStructured Portfolio inAction 9 OverwhelmedbyOurNature 9 2. The Unreliable Experts: Getting iD the Way of Outstanding Performance 11 HumanJudgmentIs Limited 12 What's the Problem? 13 WhyModels BeatHumans 13 BaseRatesAre Boring 14 The IndividualVersus the Group 15 PersonalExperience Preferred 16 SimpleVersus Complex 16 ASimpleSolution 17 Contents 3. Rales ofthe Game 21 ShortPeriodsAreValueless 22 It's DifferentThisTime 22 Anecdotal Evidence Is NotEnough 23 Potential Pitfalls 24 Rules oftheGame 26 4. Ranking Stocks by Market Capitalization: Size Matters 33 HowMuch Better? 35 ReviewingStocksbySize 39 AllStocksIs theWinner 40 Implicationsfor Investors 49 OurTwo Benchmarks 50 5. Price-to-Earnings Ratios: Separating the Winners and Losers 51 The Results 52 Large StocksAreDifferent 52 High PE RatiosAre Dangerous 58 LargeStocks Fare No Better 63 Implications 64 8. Price-to-Book Ratios: A Better Gauge ofValue 89 The Results 70 Large StocksAreLessVolatile 70 Large Stocks BaseRates More Consistent 72 High Price-to-BookStocks Do,Poorly 72 Implications 84 7. Price-to-Cashflow Ratios: Using Cash to Determine Value 87 The Results 88 Large StocksAreLessVolatile 88 High Price-to-CashflowRatiosAre Dangerous 94 LargeStocks HitToo 94 Implications 102 8. Price-to-Sales Ratios: The King ofthe Value l'actors 105 The Results 106 LargeStockswith LowPrice-to-Sales Ratios DoWell 106 Contents High PSRStocksAreToxic 106 LargeStocks Do a Little Better 113 Implications 118 9. DividendYields: Baying an Income 123 The Results 124 LargeStocksEntirelyDifferent 124 Implications 124 10. The Value ofValae Factors 133 RiskDoesn'tAlways EqualReward 133 Is ItWorththe Risk? 138 Embrace Consistency 138 LargeStocksAreDifferent 139 Implications 139 11. One-Year Earnings-Per-Share Percentage Changes: Do High Earnings Gains Mean High Performance? 145 ExaminingAnnualEarnings Changes 146 LargeStocks DoWorse 149 BuyingStockswiththeWorstEarnings Changes 149 LargeStocks Do Better 149 Implications 156 12. Five-Year Earniags-Per-Share Percentage Changes 161 The Results 161 Large StocksAreSimilar 162 Implications 162 13. Profit Margins: Do lavestors Profit from Corporate Profits? 171 The Results 171 LargeStocks DoSlightlyBetter 172 Implications 172 14. Retura on Equity 181 The Results 181 LargeStocks Do a BitWorse 182 Implications 182
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