ECSENOMICS The Only Guarantee about Stock S Prices Is That They Will Fluctuate 1-190 Figure 25-7 3-1000 " Real s&p s 2100 SP500 14 08 1920 1930 1960 McGraw-Hilllrwin Copyright C 2001 The McGraw-Hill Companies, Inc. All rights reserved.McGraw-Hill/Irwin Copyright © 2001 The McGraw-Hill Companies, Inc. All rights reserved. The Only Guarantee about Stock Prices Is That They Will Fluctuate T-190 Figure 25-7