Metal–semiconductor junction

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An inverse exchange-traded fund is an exchange-traded fund (ETF), traded on a public stock market, which is designed to perform as the inverse of whatever index or benchmark it is designed to track. These funds work by using short selling, trading derivatives such as futures contracts, and other leveraged investment techniques.

By providing, over short investing horizons and excluding the impact of fees and other costs, performance opposite to their benchmark, inverse ETFs give a result similar to short selling the stocks in the index. An inverse S&P 500 ETF, for example, seeks a daily percentage movement opposite that of the S&P. If the S&P 500 rises by 1%, the inverse ETF is designed to fall by 1%; and if the S&P falls by 1%, the inverse ETF should rise by 1%. Because their value rises in a declining market environment, they are popular investments in bear markets.[1]

Short sales have the potential to expose an investor to unlimited losses, whether or not the sale involves a stock or ETF. An inverse ETF, on the other hand, provides many of the same benefits as shorting, yet it exposes an investor only to the loss of the purchase price. Another advantage of inverse ETFs is that they may be held in IRA accounts, while short sales are not permitted in these accounts.

Systemic impact

Because inverse ETFs and leveraged ETFs must change their notional every day to replicate daily returns (discussed below), their use generates trading, which is generally done at the end of the day, in the last hour of trading. Some have claimed that this trading causes increased volatility Template:Harv, while others argue that the activity is not significant (WSJ article cites dissent).

Fees and other issues

Fees

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Short-terms vs. long-term

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In 12 months 2013, c ommercial retails, shoebox residences and mass market properties continued to be the celebrities of the property market. Models are snapped up in report time and at document breaking prices. Builders are having fun with overwhelming demand and patrons need more. We feel that these segments of the property market are booming is a repercussion of the property cooling measures no.6 and no. 7. With additional buyer's stamp responsibility imposed on residential properties, buyers change their focus to commercial and industrial properties. I imagine every property purchasers need their property funding to understand in value. In a market with a long-term upward bias, profit-making opportunities are limited in long time spans. In addition, a flat or rising market means these funds might struggle to make money. Inverse ETFs are designed to be used for relatively short-term investing as part of a market timing strategy.[2]

Volatility loss

An inverse ETF, like any leveraged ETF, needs to buy when the market rises and sell when it falls in order to maintain a fixed leverage ratio. This results in a volatility loss proportional to the market variance.[3] Compared to a short position with identical initial exposure, the inverse ETF will therefore usually deliver inferior returns. The exception is if the market declines significantly on low volatility so that the capital gain outweighs the volatility loss. Such large declines benefit the inverse ETF because the relative exposure of the short position drops as the market fall.

Since the risk of the inverse ETF and a fixed short position will differ significantly as the index drifts away from its initial value, differences in realized payoff have no clear interpretation. It may therefore be better to evaluate the performance assuming the index returns to the initial level. In that case an inverse ETF will always incur a volatility loss relative to the short position.

As with synthetic options, leveraged ETFs need to be frequently rebalanced. In financial mathematics terms, they are not Delta One products: they have Gamma.

The volatility loss is also sometimes referred to as a compounding error.

Hypothetical example

If one invests $100 in an inverse ETF position in an asset worth $100, and the asset's value changes to $80 and then to $60, then the value of the inverse ETF position will increase by 20% (because the asset decreased by 20% from 100 to 80) and then increase by 25% (because the asset decreased by 25% from 80 to 60). So the ETF's value will be $100*1.20*1.25=$150. The gain of an equivalent short position will however be $100–$60=$40, and so we see that the capital gain of the ETF outweighs the volatility loss relative to the short position. However if the market swings back to $100 again, then the net profit of the short position is zero. However, since the value of the asset increased by 67% (from $60 to $100), the inverse ETF must lose 67%, meaning it will lose $100. Thus the investment in shorts went from $100 to $140 and back to $100. The investment in the inverse ETF, however, went from $100 to $150 to $50.

Historical example

For instance, between the close of November 28, 2008 and December 5, 2008, the iShares Dow Jones US Financial (Template:Nyse2) moved from 44.98 to 45.35 (essentially flat, properly an increase of 0.8%), so a double short would have lost 1.6% over that time. However, it varied greatly during the week (dropping to a low of 37.92 on December 1, a daily drop of 15.7%, before recovering over the week), and thus the ProShares UltraShort Financials (Template:Nyse2), which is a double-short ETF of the IYF moved from 135.05 to 117.18, a loss of 13.2%.

Expected loss

Given that the index follows a geometric Brownian motion and that a fraction x of the fund At is invested in the index St, the volatility gain of the log return can be seen from the following relation.[3]

Δln⁡(At)=xΔln⁡(St)+(x−x2)σ2Δt2

where σ2 is the variance of the index process and the last term on the right hand side constitutes the volatility gain. We see that if x<0 or x>1, as is the case with leveraged ETFs, the return of the fund will be less than x times the index return (the first term on the right hand side).

List of funds

Some inverse ETFs are:

AdvisorShares

Boost

Direxion

ProShares

Horizons BetaPro

See also

References

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External links

  1. ↑ Article on inverse funds in Thestreet.com
  2. ↑ Marketwatch article on inverse funds
  3. ↑ 3.0 3.1 http://olympiainv.com/Memos/ETFs.pdf
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