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Hedge Trading

What Is a Hedge?

A hedge is an investment that is made with the intention of reducing the risk of adverse price movements in an asset. Normally, a hedge consists of taking an offsetting or opposite position in a related security.

How a Hedge Works


Hedging is somewhat analogous to taking out an insurance policy. If you own a home in a flood-prone area, you will want to protect that asset from the risk of flooding—to hedge it, in other words—by taking out flood insurance. In this example, you cannot prevent a flood, but you can plan ahead of time to mitigate the dangers in the event that a flood did occur.

There is a risk-reward tradeoff inherent in hedging; while it reduces potential risk, it also chips away at potential gains. Put simply, hedging isn't free. In the case of the flood insurance policy example, the monthly payments add up, and if the flood never comes, the policyholder receives no payout. Still, most people would choose to take that predictable, circumscribed loss rather than suddenly lose the roof over their head.

In the investment world, hedging works in the same way. Investors and money managers use hedging practices to reduce and control their exposure to risks. In order to appropriately hedge in the investment world, one must use various instruments in a strategic fashion to offset the risk of adverse price movements in the market. The best way to do this is to make another investment in a targeted and controlled way. Of course, the parallels with the insurance example above are limited: in the case of flood insurance, the policy holder would be completely compensated for her loss, perhaps less a deductible. In the investment space, hedging is both more complex and an imperfect science.


A perfect hedge is one that eliminates all risk in a position or portfolio. In other words, the hedge is 100% inversely correlated to the vulnerable asset. This is more an ideal than a reality on the ground, and even the hypothetical perfect hedge is not without cost. Basis risk refers to the risk that an asset and a hedge will not move in opposite directions as expected; "basis" refers to the discrepancy.


How Does Hedging Work?


The most common way of hedging in the investment world is through derivatives. Derivatives are securities that move in correspondence to one or more underlying assets. They include options, swaps, futures and forward contracts. The underlying assets can be stocks, bonds, commodities, currencies, indices or interest rates. Derivatives can be effective hedges against their underlying assets, since the relationship between the two is more or less clearly defined. It’s possible to use derivatives to set up a trading strategy in which a loss for one investment is mitigated or offset by a gain in a comparable derivative.


For example, if Morty buys 100 shares of Stock plc (STOCK) at $10 per share, he might hedge his investment by buying an American put option with a strike price of $8 expiring in one year. This option gives Morty the right to sell 100 shares of STOCK for $8 any time in the next year. Let's assume he pays $1 for the option, or $100 in premium. If one year later STOCK is trading at $12, Morty will not exercise the option and will be out $100. He's unlikely to fret, though, since his unrealized gain is $100 ($100 including the price of the put). If STOCK is trading at $0, on the other hand, Morty will exercise the option and sell his shares for $8, for a loss of $300 ($300 including the price of the put). Without the option, he stood to lose his entire investment.


The effectiveness of a derivative hedge is expressed in terms of delta, sometimes called the "hedge ratio." Delta is the amount the price of a derivative moves per $1 movement in the price of the underlying asset.


Fortunately, the various kinds of options and futures contracts allow investors to hedge against almost any investment, including those involving stocks, interest rates, currencies, commodities, and more.


Hedging Through Diversification


Using derivatives to hedge an investment enables for precise calculations of risk, but requires a measure of sophistication and often quite a bit of capital. Derivatives are not the only way to hedge, however. Strategically diversifying a portfolio to reduce certain risks can also be considered a hedge, albeit a somewhat crude one. For example, Rachel might invest in a luxury goods company with rising margins. She might worry, though, that a recession could wipe out the market for conspicuous consumption. One way to combat that would be to buy tobacco stocks or utilities, which tend to weather recessions well and pay hefty dividends.


This strategy has its trade offs: If wages are high and jobs are plentiful, the luxury goods maker might thrive, but few investors would be attracted to boring counter-cyclical stocks, which might fall as capital flows to more exciting places. It also has its risks: There is no guarantee that the luxury goods stock and the hedge will move in opposite directions. They could both drop due to one catastrophic event, as happened during the financial crisis, or for two unrelated reasons.


Spread Hedging


In the index space, moderate price declines are quite common, and they are also highly unpredictable. Investors focusing in this area may be more concerned with moderate declines than with more severe ones. In these cases, a bear put spread is a common hedging strategy.


In this type of spread, the index investor buys a put which has a higher strike price. Next, she sells a put with a lower strike price but the same expiration date. Depending upon the way that the index behaves, the investor thus has a degree of price protection equal to the difference between the two strike prices (minus the cost). While this is likely to be a moderate amount of protection, it is often sufficient to cover a brief downturn in the index.


Risks of Hedging


Hedging is a technique utilized to reduce risk, but it’s important to keep in mind that nearly every hedging practice will have its own downsides. First, as indicated above, hedging is imperfect and is not a guarantee of future success, nor does it ensure that any losses will be mitigated. Rather, investors should think of hedging in terms of pros and cons. Do the benefits of a particular strategy outweigh the added expense it requires? Because hedging will rarely if ever result in an investor making money, it’s worth remembering that a successful hedge is one that only prevents losses.


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