Pairs Trading Strategy
Pairs trading strategy works with stocks, options, futures and currencies. The trader first identifies a pair of instruments which show great correlation. In stocks trading, it is often two stocks of same industry (or two related industries); the trader, when he identifies a diversion from relative performance, takes long position for one stock (under performing stock) and shortens the other (the over performing stock). The cost for long position is partially or fully covered from revenue from short position. Pairs stock trader profit when stocks of the pair converge to original correlation.
In options trading, the pair can be options on two highly related stocks. The trader writes a call option for the outperforming stock and put option for underperforming stock. In futures trading, it is a pair of mini or full-size contract or futures on related instruments. The trader takes long position for one future and short for other.
In pairs trading strategy, the most difficult task and major success determining factor is finding instruments with high correlation. Trading pairs can be figured out using both fundamental and technical analysis tools. The position sizing and timing of trades are also very important. Often a pairs trading opportunity last for a short-time, thus the trader needs automated trading systems and faster decision making skills.
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