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Good morning, Barbara, and please call me , Izzy. Thank you for the invitation to discuss one of the important fundamentals to sound investing: an
Good morning, Barbara, and please call me Izzy. Thank you for the invitation to discuss one of the important fundamentals to sound investing: an appreciation of the relationship between the objective or outcome of your investment, that is its and the likelihood of receiving it or the investments
BARBARA: Lets begin with a generalization regarding the financial markets. How are people buying and selling investments in the financial markets generally assumed to react to risk? And, how do the markets define risk
IZZY: Risk is best thought of as the potential for variability in the investments outcomes. This means that if an investment has the potential to provide only one possible outcome or return, then it is while if there is more than one possible return or result, then the asset should be considered This is why securities sold by the US Treasury have historically been considered to be the securities in the world; because except in the event of the failure of the US government, any investor holding a Treasury security would receive the securitys face value upon its maturity.
Most investors have an expected outcome associated with an investment, and risk refers to the potential for receiving an outcome or return that is greater or less than his or her expected return. It is not surprising that investors receiving investment returns that exceed their expected return, but they tend to respond differently if the investment can generate a lower return. This potential for outcome is the risk on which most investors focus.
In general, the majority of investors, or those buying and selling securities are assumed to be This does not mean that they wont purchase or sell risky securities or projects, it simply means that they be compensated with a risk premium or additional return for taking on projects or securities exhibiting additional risk.
BARBARA: So investors require a given amount of return for investing in a riskfree investment, and then require an additional risk premium if they invest in projects or securities that exhibit risk? Is that correct?
IZZY: Thats absolutely correct! And the magnitude of the risk premium will as the amount of risk exhibited by the investment increases. So the riskiest investments require the risk premiums, and investments exhibiting relatively little risk require risk premiums.
BARBARA: OK that makes sense, but how do you know how risky an investment is
IZZY: It depends on how many investments you hold. If you hold only one investmentnot just one type, such as one house, one car, one savings account, but one of all possible investmentsthen you can measure the riskiness of that investment by calculating the of the investments possible returns.
If youre holding a portfolio of assets, on the other hand, then the risk that is of greater interest is the riskiness, and how the addition of a new security or asset would affect the overall riskiness of the portfolio. This brings us to a related concept: the advantages and disadvantages of
BARBARA: This is related to the notion of not putting all of your eggs in one basket, isnt it Doesnt it mean just holding a bunch of securities rather than only one or two? That way if the value of one stock goes down, its loss will be offset by the gains exhibited by the other securities in the portfolio. Right?
IZZY: Not exactly. Effective diversification requires knowledge of the extent to which the returns of an asset exhibit the same changes, increases or decreases over time, as the returns of another asset or group of assets. Notice that it is not the magnitude of return that is important in this case, but the degree to which their movements are synchronized over time. This tendency to move together is measured by the assets and assets that are generate returns that exhibit the identical pattern over time. In contrast, assets that are generate returns that exhibit the exactly opposite pattern.
Another way of thinking about the riskreduction benefits of diversification is to focus on the standard deviations of the assets. If the standard deviation of the returns of an asset being added to a portfolio is than the standard deviation of the portfolios return, then the riskiness of the portfolio will increase, rather than decrease, which is contrary to the goal of diversification.
It should be noted, however, that during the period of to the correlation coefficient for most pairs of randomly selected US companies was This means that the addition of a randomly selected US company to a portfolio of other US corporations should the riskiness of the portfolio.
BARBARA: Izzy, this is fascinating stuff. Unfortunately our time is up but Id like very much for you to come back next week to continue our discussion. Would that fit into your schedule?
IZZY: Of course, and Ill look forward to it However, before I leave, Id like
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