Quote from waelmg:
i wonder if someone can explain to me what hedging,having a trade in opposite direction, is used for?
thanks
that's ridiclous. you don't hedge by holding position in opposite direction of the same asset.
hedging is about hedging the risks involoved in holding the underlying asset, and if u hold the same asset in opposite direction, you don't even have a position.
a general hedge is hedge against the market so that you cut away the market risk involoved in ur trading, i.e. go long on the instrument u are trading and go short on S&P500 or Nasdaq100 (as if they are the 'market' and if they change greatly it can pose a risk to ur trading - of course this depends on the correlations).
anothe example is hedging credit risk, so you buy bonds and at the same time u enter credit default swap contract that protect u against the bond defaulting.
other examples you go long on a stock, at same time buying put options to hedge ur bet. or u want to sell call options and u hedge by buying the underling asset.
one good way of hedging is pairs-trading, finding two very similar companies in the same industry, going long in the dominant one, and shorting the 2nd one.. if market news is good, ull gain more, and if its bad, u should gain more again (again if u're pickings are right). this is called market neutral or stat-arbitrage strategy.
sometimes investing in other countries exposes u to FX risk, so you might need to hedge against $ or the local currency against the underlying asset (again this depends on correlation between the two).
in short, heding is about getting rid of the risks involoved in ur trading as much as u can. holding positions in the same way in opposite direction is not heding. u're basically closing ur position.
JUST TO ADD: as much as hedging is a great way to minimize ur risk - it will also minimize returns, and some major traders don't hedge at all for this reason - but it some have blown up pretty quickly. it really depends on ur approach and how important hedging is to you. some hedge funds are very succesfuly heding all their positions.. hope that helps.