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Alpha and Beta

A popular Wendy's commercial in the 80s made famous the question: "Where's the beef?" Good one. And here's an even better one: "Where's the alpha?" You might want to whip this one out the next time you meet with your portfolio manager.

Alpha is the over-and-above-the-expected return. It is the "value added." Therefore, it makes sense that a positive alpha means an investment has outperformed its market-predicted return, while a negative alpha would mean just the opposite. The expected return is calculated by a formula that takes into account the investment's level of unavoidable risk (aka beta).

Ever stepped into an elevator and after the doors close you become aware of an almost-suffocating scent coming from the woman next to you who must have bathed in perfume? Well, as you know, once the doors close you can't escape the smell until the ride is over. This is similar to beta, which is risk that can't be reduced or diversified away. A measure of "systematic" or market related risk, beta is used as a measure relative to a certain index -- such as the S&P 500.

So, for example, let¿s say your portfolio is managed to compete against the S&P 500. If you generate a better return than the index while not taking on added risk (standard deviation of returns) then you get alpha. Low beta means the market-related risk is low and vice versa for high beta.

Another example, let's say a mutual fund or stock has a beta of 1.5 relative to the S& P500 ¿ that means it is 1.5 times as risky. So, over time, if the S&P 500 goes up 1%, your portfolio should be up 1.5% plus (one can hope) some percentage of alpha. If the S&P 500 is down 1%, your portfolio should be down 1.5%.

Alpha and beta are based off of linear regression of a set of data. Warning: this may cause a high school fifth-period flashback, but it will be over before you know it:
The equation for a line is Y = a + bX.

a = alpha (the Y intercept - the added value)
b = Beta (the coefficient you multiply X by)
X = S&P 500 (in this case)
Y = your portfolio

Home / Markets / Economy

Up and Coming

Reality Check

 
 
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After a week with seemingly conflicting numbers, the upcoming week will likely only add to the confusion about the state of the economy. Look for leading indicators Monday and the Chicago Fed National Activity Index Tuesday to reinforce suggestions of an economic downturn or recession. We'll also be reminded of the ongoing struggles in the housing market this week, with reports from the Office of Housing Enterprise Oversight Thursday on home price values and from the National Association of Realtors Friday on existing home sales Friday.

Those struggles – particularly home values – have resulted in some lenders trimming or freezing home equity lines of credit, further compressing consumer spending.

The OFHEO report is also a critical indicator because some banks use it to develop forecasts which they employ to estimate loan losses and writedowns -- forecasts which may be overly optimistic. According to a recent report in The Wall Street Journal, the Case-Shiller index may be more realistic. “In recent weeks, Wachovia and WaMu have cited housing data from OFHEO when detailing their exposure to the U.S. housing market. A different index relied on by other banks, the S&P/Case-Shiller Home Price Indices, is gloomier.” (The Case-Shiller Index for March is due out on May 27, five days after the OFHEO report for the same month.)

The reports in the coming week will follow a week of data releases in which some of the detail was far less positive than the headlines, and, in some instances, seemed unrealistic. Take, for example, the Consumer Price Index report on Wednesday. The report itself was relatively benign. Overall inflation was 3.9% in April, down from 4.0% in March and the “core” inflation rate (excluding food and energy) was 2.3%, down from 2.4% one month earlier.

The dip in the inflation rates indeed supported contentions by the Federal Open Market Committee that inflation expectations are contained. It also supported arguments that the economy is in recession since recessions are inflation killers.

Within the report though were a couple of gems. For example, the report noted a seasonally adjusted 2.0% decline in the price of gasoline in April even as the Energy Information Administration reported a 21.4-cent, or 6.6% increase, in the average price of a gallon of regular gasoline in the same month.

The CPI report also revived an old joke: “What should we make for dinner?” “Reservations.” According to the CPI data, the year-over-year change (inflation rate) of “food away from home” was 4.1% while the inflation rate for “food at home” was 5.9%. Reservations are cheaper!

Similarly, Friday’s report on housing permits and starts seemed to show a revival in the housing sector with an unexpected uptick in both housing permits and starts. The increase though was due primarily to increased multi-family, not single-family, activity. The continued drop in single-family construction activity is both good and bad news. Fewer homes being built will allow builders to cut into the inventory of unsold homes, but at the expense of construction. And, as builders seek to sell homes by offering incentives and price cuts, they might meet some resistance from buyers who will wonder if prices will be dropping further. That certainly contributed to last week’s further decline in the National Association of Home Builders’ Housing Market Index.

For the week upcoming, the report next Friday on April existing home sales will likely be disappointing. The report is based on closings, thus reflecting economic conditions two months earlier when deals were struck. In February, consumer confidence dropped and purchase mortgage application activity fell sharply.

 

Monday, May 19  
  Leading Economic Indicators (April)
  March actual: Up 0.1%
  April consensus: Down 0.1%
   
  National Association for Business Economics Outlook
   
   
Tuesday, May 20  
  Producer Price Index (April)
  All items (finished goods) M-M/Y-Y
  March actual: up 1.1% / 6.9%
  April consensus up 0.4% / 6.6%
  Ex Food and Energy
  March actual: up 0.2% / 2.8%
   
  Chicago Fed National Activity Index (April)
  March actual / 3 Month Avg: -0.78 / -0.86
  No April consensus
   
  Federal Reserve Vice Chairman Donald L. Kohn speaks on the Economic Outlook at the National Conference on Public Employee Retirement Systems Annual Conference in New Orleans
   
   
Wednesday, May 21  
  MBA Application Index Week ended: May 9
  Week Ended May 9: 674.4, up 2.9%
  Four-week moving average: 633.6, down 2.7%
  No May 16 consensus
   
  FOMC Minutes (April 29-30)
   
  Federal Reserve Governor Kevin M. Warsh speaks on Using the Federal Funds Rate in Extraordinary Times at a luncheon meeting of the Exchequer Club in Washington DC
   
   
Thursday, May 22  
  Unemployment Insurance Claims Week Ended May 17
  May 10 Actual: 371,000 up 6,000
  May 17 Consensus: 370,000
   
  OHEO Home Price Index (March and 1Q)
  4Q actual: +0.9
  No 1Q consensus
   
  Mass Layoffs (April) Events / Employees Affected
  March actual: 1,571 (down 101) / 157.156 (down 20,218)
  No April consensus
   
  Federal Reserve Governor Randall S. Kroszner Speaks on Prospects for Recovery and Repair of Mortgage Markets at the Conference of State Bank Supervisors Annual Meeting and Conference in Amelia Island, Fla.
   
   
Friday, May 23  
  Existing Home Sales (April)
  March actual: 4.93 million
  April consensus: 4.85 million (down 1.6%)

 

Mark Lieberman is the senior economist for the Fox Business Network. Prior to joining FOX, he served as first vice president at Washington Mutual, where he was manager of economic analysis and research. Before that, he served as senior vice president at Dime Savings Bank of New York (which was later acquired by Washington Mutual), where he specialized in credit and risk management. He has a degree in Economics from the Wharton School of the University of Pennsylvania.

 

 

 

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