Fama And French Model And Capm Finance Essay

Fama And French Model And Capm Finance Essay

Estimating the expected return of the plus is the fundamental of finance topic and it is critical to the being of the concern. There are two theoretical accounts of plus pricing widely used to cipher the cost of equity: Capital plus pricing theoretical account ( CAPM ) and Fama and French three factor theoretical account. This study will critically analyse the strength every bit good as failing between two theoretical accounts ; besides, it will explicate the ground why CAPM are widely used by the director even though it has rather a batch of defects.

CAPM ( Capital plus pricing theoretical account ) is used to cipher the expected return on one stock, bespeaking the stopping point relationship between the expected return of the hazardous plus and the Beta ( specific systematic hazard, derived from the time-series arrested development analysis ) . CAPM predicts that stocks with high expected return should hold high hazard because the expected return has positive additive relation with the non-diversifiable hazard i.e. Beta. ( IRJ )

CAPM equation:

Tocopherol ( R ) = rf + Beta [ E ( rm ) – releasing factor ]

CAPM is widely used to gauge the price reduction rate of the house ‘s future hard currency flows. Another application of CAPM is the Sharpe ratio e.g. wages to variableness ratio, it measures the public presentation of the plus by spliting the expected return by the standard divergence. ( investing )

SML ( Security market line ) graphs the relationship between Beta and the expected return, it measures the rate of return needed to counterbalance for the hazard born by the investors, and for the clip value of money as good. Equally long as CAPM holds, all assets should lie on the SML. Securities prevarication above the SML will hold greater expected return with the same hazard, which means they are underpriced, the difference between the existent and expected return is called alpha or unnatural return. In world, the investor would wish to purchase the underpriced and sell the overpriced securities.

CML ( Capital market line ) shows the relationship between the expected return and the standard divergence by blending hazardous portfolio with the hazard free plus. ( Bodie )

The Sharpe-Lintner theoretical account indicates that the Jensen ‘s alpha or intercept is zero. Actually, harmonizing to recent trials of Douglas ( 1968 ) , Black, Jensen and Scholes ( 1972 ) , Blume and Friend ( 1973 ) every bit good as Fama and French ( 1992 ) , the intercept is greater than the hazard free rate. ( JEP )

Harmonizing to Banz ( 1981 ) , CAPM theoretical account fails to explicate the relation between the house size and the expected return, which is called size consequence. Similarly, the book-to-market ratio is another of import factor that can impact the return of the stock. Several trials have proved that Beta entirely is non plenty to explicate all the hazards in world. ( IRJ )

CAPM plants by gauging beta from the market, uniting it with the hazard free rate and market return to cipher the cost of equity capital. However, several empirical trials have proved that the existent relation between Beta and the expected return is much lower than the anticipation of CAPM. Harmonizing to Friend and Blume, CAPM indicates that high beta stocks have high returns and low betas stocks have low returns, which is imprecise. ( JEP )

To get the better of this failing, research workers such as Jensen and Scholes ( 1972 ) , Friend and Blume ( 1970 ) have tested and they conclude that utilizing Beta of a portfolio would be more precise than utilizing Beta of single stock. Beta can explicate single stock return therefore it is able to explicate the portfolio return ; utilizing portfolio beta can assist cut down mistakes in variable jobs. Although this method still has a little job, it decreases the statistical power ; it can be fixed by screening portfolios by the beta, from the lowest to the highest. ( JEP )

To analyze the efficiency of Beta, an empirical trial on the Athens Stock Exchange ( ASE ) has been run:

100 stocks have been selected from FTSE/ ASE 20, FTSE/ ASE Mid 40 and FTSE/ ASE Small Cap and they were formed into 10 portfolios. The tabular array below is the sum-up of the consequence from the arrested development analysis.



beta ( P )































Average Rf



Average rm= ( Rm-Rf )


Beginning: Metastock ( Greek ) Data Base and computations ( S-PLUS )

( IRJ )

One of the chief points of CAPM is that high Beta should ensue in high expected return. Nevertheless, the trial on 100 stocks of ASE has provided an opposite decision. Portfolio a10 has the lowest Beta ( 0.5474 ) but it has the highest return ( 0.0001 ) while j10 has the highest Beta with the lowest return.


Beside CAPM, the three factor theoretical account ( or Fama and French theoretical account ) is another option to accomplish plus pricing. Harmonizing to the theoretical account, the sensitiveness of the expected return depends on those three factors:

+ The difference between the return on the market portfolio and the hazard free rate: rm – releasing factor

+ The difference between the return on the portfolio of little stocks and the portfolio of big stocks: SMB ( little subtraction large )

+ The difference between the return on the portfolio of high book- to- market- value stocks and portfolio of low book to market value stocks: HML ( high subtraction depression )

The expected return of stock “ I ” is:

Er ( I ) – releasing factor = alpha ( I ) + Beta ( I ) ( rm – releasing factor ) + Beta ( SMB ) R ( SMB ) + Beta ( HML ) R ( HML ) + vitamin E ( I )

Fama and Gallic indicate that houses with high book to market value ratio and positive incline on HML are more likely to derive higher returns and in return, have higher possibility in confronting fiscal hurt because little houses are more sensitive to alterations of the market.

( Multifactor )

One of the most serious defects of Fama and Gallic theoretical account is the impulse consequence of Jegadeesh and Titman ( 1993 ) , which indicates that stocks which showed high returns in the past 3 or 12 months will go on to derive high returns in the following several months and likewise, stocks performed severely in the yesteryear would go on to hold hapless public presentation. This premise is left unexplained. ( JEP ) ( Multi )

Besides, bad-model is another job that Fama every bit good as other plus pricing theoretical account fail to explicate. Although the three factor theoretical account seems to give more accurate consequence, it is still based on the empirical theoretical account of expected returns ; nevertheless that theoretical account can non wholly explain the mean return. The bad-model consequence is less serious in the short term returns ( day-to-day ) ; nevertheless, it becomes of import in long term returns, particularly on little stocks. ( 10.1 )

Finally, because Fama and Gallic explain more clearly the factors of hazard, it requires elaborate prognosis of market index return, SMB every bit good as HML return, which make it hard and expensive to use this method. ( Bodie )


Beta from CAPM entirely can non to the full explained the entire hazard of the stock, while Fama and Gallic theoretical account indicates that the sensitiveness of the return depends on the market, size and book-to-market ratio to explicate the expected return, many surveies have proved that the Fama and Gallic theoretical account provides a more accurate appraisal for the expected return. CAPM fails because Beta shows small relation to variables such as BE/ME, PE and CP ratio which are of import in finding the expected return.

Here is an illustration of using Fama and Gallic theoretical account and CAPM in Thailand Stock Exchange:

421 companies are divided into 6 groups: SH, SM, SL, BH, BM, BL. S and B are the size of the company, whereas H, M, L represents the book-to-market value.




Fecal matter

Shining path








( Thailand )

The tabular array below shows the adjusted R squared of CAPM and Fama and Gallic theoretical account in Thailand Stock Exchange from 2002 to 2007:

Harmonizing to Bodie, adjusted R-squared is the square root of the correlativity coefficient, it estimates the arrested development line. It is called the step of goodness -of-fit ; adjusted R-squared is besides a tool to compare the utility among theoretical accounts because it can mensurate how much of the difference in single stock return can be explained by the appraisal. ( Compare )



Fama and Gallic










Fecal matter



Shining path






Harmonizing to the tabular array above, the value of adjusted R-squared of Fama and Gallic theoretical account dominates the CAPM. The mean value of FF theoretical account is 0.63 where as CAPM ‘s is 0.3. The scope of CAPM is from 0.077 to 0.671 while FF theoretical account ‘s scope is from 0.33 to 0.91. Apparently, Fama and Gallic theoretical account can show more expeditiously than CAPM theoretical account. ( Thailand )

Here is another trial ran by Zhi Da ( 2008 ) to compare the efficiency between two theoretical accounts:

A set of 30 portfolio has been created and analyzed:


Cross sectional Analysis



FF 3 Factor

Average Factor Return








[ 1.75 ]

[ 2.39 ]









[ 1.85 ]

[ 1.18 ]








[ 1.72 ]







[ 0.88 ]

adj R2

32.51 %

35.91 %

( point )

Harmonizing to the tabular array, the intercept of Fama and Gallic theoretical account is consistent with it ‘s theory, it is greater than CAPM ‘s ( 0.005 versus 0.0034 ) , while FF ‘s market factor is less than CAPM ‘s. The important strength of the three factor theoretical account is that it acounts for the hazard of the size and book-to-market ratio of the company, and hence the theoretical account has higher coefficient as opposed to CAPM, Fama and Gallic theoretical account can explicate about 36 % of the expected return, whereas CAPM can explicate merely 32.5 % .


CAPM indicates that Beta entirely can explicate all the hazards related to the expected return, the price reduction rate and Beta is strongly related. However, several trials have proved that CAPM failed. The first point is that the intercept is really greater than the hazard free rate. Second, Beta entirely is non plenty to explicate the hazard ; the expected return can be affected by other factors such as the size and book-to-market ratio. And eventually, in world, Beta does non hold the relationship with expected return every bit strong as predicted by CAPM.

Fama and Gallic theoretical account supply a more accurate appraisal as opposed to CAPM. It indicates that the expected return are affected by three factors: market return, size consequence ( SMB ) and book-to-market ratio ( HML ) . However, it still has defects. The first defect is that it failed to explicate the impulse consequence. Second, non merely Fama and French but others plus pricing theoretical account are based on the empirical theoretical account of expected return, which can non wholly explain the mean return. Finally, the three factor theoretical account is rather complex and expensive to use. If the prognosis of the market return, SMB or HML is non accurate, so the consequence might be worse than CAPM ‘s. Therefore, although CAPM theoretical account still has a batch of defects, it is still widely used by directors. ( Bodie )