November 1st, 2004, 6:43 pm
In the three-way collars I have seen, all three legs have the same notional. There are two flavors, the buyer either gets a better collar by accepting some downside if the price goes far outside the collar in the bad direction; or the buyer gets a worse collar, but participates in some upside if the price goes far outside the collar in the good direction.For example, suppose a gold producer can get a zero-cost two-way collar to sell 1,000 troy ounces at a price between $400 and $450. That means buying a put at $100 and selling a call at $450, each for 1,000 ounces.It might be willing to give up protection if gold falls below $350, on the grounds that it will close down its mine at that point. In that case, it might sell a put for 1,000 ounces at $350, buy a put for 1,000 ounces at $410, and sell a call for 1,000 ounces at $460.Alternatively, it might decide it wants to participate in price increases above $500. So it might buy a put at $390, sell a call at $440 and buy a call at $500; all for 1,000 ounces.A participating swap is just an option, renamed for marketing reasons.