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What is the Sharpe Ratio?

DEFINITION:

The Sharpe ratio (also known as the Sharpe index, the Sharpe measure) – is a tool that helps investors to measure the amount of risk they are taking versus the performance of their investment. It was developed by and named after William F. Sharpe in 1966.

Understanding the Sharpe ratio


The Sharpe ratio was developed by a professor of finance and Nobel Laureate William F. Sharpe. His goal was to give investors a broader perspective on the amount of risk they are taking to achieve a desirable ROI (return on investment). The Sharpe ratio estimates the performance of their investments after deducting the risk-free rate of return and then dividing by the standard deviation of the surplus revenue. The risk-free rate is the theoretical rate of return with a relatively safe investment where the risk is close to zero. The standard deviation constitutes a risk indicator that measures price oscillation from the average price.

The Sharpe ratio appears to be a useful tool for those investors who need to juxtapose risk-adjusted returns of particular portfolios and assets. In its turn, the portfolio with a higher Sharpe ratio theoretically would have a better performance once it’s been adjusted for the risk.

Recap

Everybody tends to gain as much as possible from their investments. And we are all aware of the necessity of the importance of the risk assessment. The Sharpe ratio could provide you with certain support and help you to evaluate all the risks you’re taking with your assets and investment portfolio. Who wouldn’t like to achieve the same returns but also take significantly less amount of risk?

Is there a “good” Sharpe ratio?

As we know already, the Sharpe ratio is a remarkable instrument for comparing the returns of different investments. Also, it helps us to understand whether adding an asset to a portfolio would affect the risk-adjusted returns. When the Sharpe ratio is high, your risk-adjusted returns are better. It’s widely accepted that a ratio below 1.0 isn’t satisfactory, i.e., the risks you’re taking are certainly excessive. The acceptable risk would be in a range of 1 to 1.99; 2.0 – 2.99 would be good enough, and 3.0 + would be considered as the excellent one.

The difference between the Sharpe ratio and the Sortino ratio.

Both of the ratios could help us to estimate the risk-adjusted returns. However, they have different approaches. The main difference lies in the fact of how one should address the standard deviation and also volatility.

The Sharpe ratio uses the total volatility and takes the standard deviation of both the positive and the negative surplus returns. It’s important to note that the upside volatility and the increasing price movements could distort the results and then give a lower Sharpe ratio.

While the Sortino ratio relies on only negative volatility and uses only negative excess returns, by removing the upside volatility, the Sortino ratio doesn’t treat the positive volatility as a “risk’ or a “threat.” However, lots of investors tend to prefer the Sharpe ratio for assets that have low volatility with the low price oscillation. And in the case of a lot of volatility, there’s a strong tendency to rely on the Sortino ratio, with its isolation of the declining deviation.

What about the limitations?

The fact that the Sharpe ratio is taking into account both the positive and the negative volatility could be seen as a significant limitation. Even with the positive price swings, the ratio could be lower. That happens due to the lack of distinguishing the positive and the negative price fluctuations.

Another limitation we should take into account is that the ratio could be adjusted and manipulated in a way. You could either play with the time period; the ratio would be different in case you measure only daily returns or if you measure longer time periods. The daily ones would always be higher than the weekly or monthly ones.

One more reason why the Sharpe ratio could be tricky is that you can always choose the period you’re assessing. And by that, you could present the best potential risk-adjusted returns. For instance, one could choose a period with low volatility and to smooth the ratio calculations.

What is a Stock?

DEFINITION:

A stock – is a piece of a business property. Owning a share you become a stockholder which means you have rights on getting dividends in case your company scores a success and you also have some voting rights.

What is a Stock?

Stocks are a crucial part of the world economy. They allow companies to find money for the business by selling shares (or pieces of ownership) to the public . They can be sold in such stock markets as NASDAQ and many others. Sometimes stocks can be bought in a private way. The Securities Exchange Commission (SEC) establishes some specific rules which control the abilities of companies to operate with shares. There are two types of shares – common stocks, which allow investors to vote in business processes, and preferred stocks, which, on the one hand, aren’t able to give shareholders any vote rights, but on the other provide them an unlimited constant payment for dividends.

EXAMPLE

As you can see, shares seem to be a piece of property in the donuts company.

Let’s pretend that you want to create your own donuts business. However, there is a problem – the 1000 dollars you have are not enough to start the business. Then you ask your family members or friends to increase your seed capital and buy on this money all the things you need for the baking. If three relatives give you 1000 dollars per head, the final sum will consist of 4000 dollars so you can easily get started with the business. You can propose 25% of ownership in your company in exchange for their investment. This is a simple example of the shares working process.

A page from the history

The first people who started using a tool similar to stocks were the Romans. The state was hiring business owners to sell something kind of stocks and debt capital for their projects. This process is now known like “lease holding”.

In the 1600’s the first stock selling business was considered the British East India (EIC) company. It was called like this because of selling commodities all over the Indian ocean region. This company is believed as the parent of modern joint-stock companies.

The difference between stocks and other financial instruments

There is a big difference between stocks and bonds. First of all, bonds are based on the debt issues which means governments or companies borrow money from investors and in exchange for this provide them % from the bond value. Bond holders aren’t able to take part in business decisions, however their investment is more guaranteed than the shareholders’ one. Another thing which differs stocks from bonds is the way of  how they are traded. Shares are usually traded on stock markets while bonds are sold over the counter (investor has to contact only with the issuing company).

What differs futures and options from stocks? The greatest difference is that first ones, unlike shares, are considered as derivatives, so their value is connected to another assed as commodities or currencies. Their conception is based not on ownership but on contracts.

Stock market operating principle

The definition of the “stock market” is a general term that includes a large number of markets where stocks are sold, bought and issued on an ongoing basis.

The “stock market” consists of many other separated stock exchanges. The Better Alternative Trading System (BATS), the New York Stock Exchange (NYSE), the Chicago Board Options Exchange (CBOE) and Nasdaq are the most popular stock exchanges in the USA. These stock exchanges in aggregate constitute the whole stock market of the U.S.

In spite of being called “stock exchanges”, they also provide the ability to trade bonds, derivatives and commodities.

Stock types

Common Stocks. Company stocks are most likely to belong to this category, so if you own a company stock it is probably a common stock. The greatest priority of this type is the fact that they bring owners voting rights. In many cases every share is rated as one vote. Common stockholders are able to bear a part in annual meetings and vote for business issues (like choosing company strategy).

Preferred Stocks. This type of shares is usually bought by some who are interested not in corporate issues but in stable dividend payments. These stocks can also be redeemed by the emitter.

Some more actual terms

Free/public float – shares which are published on the market and traded on the stock exchanges. The higher rate of this index shows the bigger amount of money a company tries to receive from investors.

Stock splits – the process of making the stock value more available for investors. There won’t be any changes in the market capitalisation whereas the number of accessible shares will increase.

Short-selling – means selling shares without being an actual shareholder. It is used when an investor is trying to speculate on the decrease of prices. It also needs borrowing stocks from others.

Stockholders equity – is based on the assets which stay in the company after paying all the issues. This index better explains the value of shares.

Blue-chip stocks – some companies which are large, liquid and well-capitalized, are usually traded on such stock exchanges as NYSE or Nasdaq.

Broker – a person or a company makes deals in the place of an investor and in exchange for this receives a commission.

Buying on margin – is a deal when an investor borrows money to buy some shares.

What is a Bond?

DEFINITION:

A bond is similar to an IOU (‎«‎I owe you»‎ ) that is issued by a company, government or other financial institution in exchange for cash. Like stocks, it can be traded in financial markets.

An understanding of bonds

When a company needs money, there are two choices: to sell stocks in themselves or to borrow money. In this case, a bond-issuing organization is borrowing money from investors. Bond investors are lenders because the bond issuer owes them repayment of their funds. They can sell their bond to other investors, allowing the bond to trade in the market. When the bond is due (when it “matures”), the bond issuer repays the bond’s owner and usually makes interest payments (“coupons”) along the way. However, because businesses can fail, there is no guarantee that bondholders will be paid back.


The main point:
a bond = an IOU you can trade, but without the guarantees

A bond establishes a borrower-lender relationship. The borrower is the company that issues the bond, and the lender is the investor who purchases the bond. Borrowers receive cash, while lenders typically receive interest payments. However, companies, entities, and governments that issue bonds may go out of business, which may result in the bond investor not receiving the IOU repaid.

Bond issuers

There are four main groups:

1. Corporations: they issue bonds to raise cash for launching the projects, leasing new properties, acquiring another company, or other aims.

2. Municipal governments: Municipal bonds are issued by local governments or states in the United States. They are commonly referred to as “munis” for short. Depending on where they live, some investors may find that purchasing a muni bond in their home state has tax advantages over other bonds because home-state interest payments may be tax exempt.

3. Federal governments: Bonds issued by the federal government are among the least risky investments available because they are guaranteed by the US government’s “full faith and credit,” and they are known as “Treasury bonds” or “Treasuries.” The United States government issues Treasuries and uses the proceeds to fund government employee salaries, military contracts, public health initiatives, and other government spending needs

4. Others: There are some other organizations, which can also issue bonds to finance themself for growth opportunities, like universities or public transit agencies.

Type of bonds

Convertible bonds are corporate bonds that allow the bondholder to exchange the bond for proportionally priced company stock. Because the bondholder benefits from the option to convert the bond, the interest rate paid by the bond issuer is typically lower than that of a standard non-convertible bond. The bond issuer benefits from lower interest rates because you benefit from convertibility.

Zero coupon bonds are not paying a coupon interest payment to the bondholder. Instead of that, they are sold at a lower (discounted) price than their final face value. So the potential benefit to the investor is the difference between the amount paid to purchase the bond and the amount repaid at maturity. The bond issuer does not pay out any interest or coupons along the way.

Bonds that can be terminated early by the issuer or the investor are called callable or puttable bonds.


A callable bond. Prior to the bond’s scheduled maturity, the issuer of a callable bond has the right to “call” (demand) the bond. Since the potential to call a bond early is advantageous to the issuer and costly to the bondholder, the issuer typically charges the bondholder a higher interest rate to make up for it.

A puttable bond. This type of bond can be “put” (sold back to the issuer) by the bondholder at certain times before the maturity date. It is beneficial for bondholders to be able to put a bond back to the bond issuer. To compensate the issuer for that cost, the bond tends to offer a lower interest rate paid to the bondholder.

Bonds in the markets

Bonds are traded on public securities exchanges just like stocks. Government bonds may be purchased directly from government institutions or through a bond broker. Even buying funds made up of bond investments would expose you to bonds. The price and the interest rate are the two essential components of a bond that must be understood in order to determine its value, regardless of how you access bonds.

Interest rates: The issuer’s interest rate is what gives a bond its value to an investor. The interest rate that an issuer must pay depends on how creditworthy it is, or how likely it is to repay the bond when it matures. For riskier bonds, investors should anticipate higher interest rates.

Prices: Investors can benefit from purchasing a bond at a discount (lower) price and having it repaid at the full price. The “full price” is known as “face value,” and for a bond, it is typically $1,000. It is possible to purchase a bond at a discount price such as $900 and be repaid the full face value of $1,000 at maturity. The $900 bond may also lose value if the issuer is at risk of defaulting or actually defaults. Defaulting means failing to make legally required payments to the bondholder.

Interest rates and bond prices have an inverse relationship that resembles a see-saw. Bond prices tend to fall when interest rates in the economy rise.

About bond risks

There are no guarantees that an investor will generate a fair return from a bond investment. Bonds are claimed as less risky than stocks because issuers are legally obligated to repay bondholders but not shareholders. Bonds can be used by investors to diversify and reduce the overall risk of their portfolios by balancing what is invested in stocks. However, bond issuers can go bankrupt, and bondholders may lose their entire investment. Bond prices are less volatile than stock prices in general, but here are two major risks.

Default Risk: A default occurs when a borrower (the bond issuer) fails to pay the bondholder’s interest payments or even the entire principal. This is typically caused by the company becoming insolvent, which occurs when it incurs more debt than it can repay. Defaults are frequently associated with bankruptcies, which are legal proceedings that determine what happens to an insolvent company.

Interest Rate Risk: The bond issuer pays interest to the bondholder in the form of coupon payments, and the bondholder wants the highest coupon payments possible given the bond’s risk. If interest rates rise and other companies (with comparable risk levels) begin issuing bonds at higher interest rates, your bonds may become less appealing to investors. As a result, the bond’s price may fall.

Always take into consideration:
Bond rating = risk level of the bond

If your university friend asks you to borrow money to buy some food, you can analyze his ability to pay you back. Credit rating agencies take a similar approach when evaluating bond issuers, but they typically conduct more rigorous and complex analysis to determine an issuer’s creditworthiness. They also publish the results of their analyses, known as credit ratings, to assist investors in making decisions.

Credit ratings

Credit ratings are produced by different separate companies (such as Fitch or Standard & Poors) to evaluate the financial health and creditworthiness of an issuer of bonds. They use many factors, but focus on evaluating the company’s capability to repay its debts. If its business is growing in terms of sales and profits, its credit rating is more likely to improve than if it is not. When a country experiences an economic downturn, its government credit rating is more likely to suffer.

  • Investment grade indicates a moderate to low risk of default. These are companies with ratings of Baa or higher (from Moody’s) or BBB or higher (from Standard & Poor’s) (for S&P). The highest grade is Aaa or AAA, which is held by only a few governments, corporations, and other bond issuers.
  • Non-investment grade = high credit risk. These issuers, commonly referred to as “junk bonds,” have high debt levels — investors should be aware that their bonds have a significantly higher risk of default. In exchange, investors will typically demand higher interest rates to compensate for the additional risk they are taking on.

Are bonds = fixed income?

The answer is YES. That is the technical term referring to bonds in general. Because many bonds pay a consistent coupon payment to the bondholder, the bondholder receives a fixed amount of income from the company that issued the bond. Fixed income investments may be appealing to retirees who rely on their investments for consistent income streams to fund their lifestyles.