What Is It?
A zerocoupon security, or "stripped bond", is basically a regular couponpaying bond without the coupons. The process of "stripping" or "zeroing" a bond is usually done by a brokerage or a bank. The bank or broker stripping the bonds then registers and trades these zeros as individual securities.
Once the bonds are stripped, there are two parts: the principal and the coupons. The interest payments are known as "coupons", and the final payment at maturity is known as the "residual" since it is what is left over after the coupons are stripped off. Both coupons and residuals are bundled and referred to as zerocoupon bonds or "zeros".
You can think of a zerocoupon security just like a Tbill. Basically, you pay a certain amount right now in exchange for the par value of the security at a future date, usually $1,000. For example, you might pay $800 for a zerocoupon bond today and in five years you will receive the par value of $1,000. The longer the time to maturity, the cheaper you can buy the bond for. This predictability also makes zeros popular  when you buy the security, the yield is essentially locked in.
Objectives and Risks
The basic objective of a zerocoupon security is "buy low, sell high". You purchase the bond for a sum of money, and once it reaches maturity you will be paid an even larger sum of money. When interest rates are low, the price of the zero will be higher. The best time to buy a zero is when interest rates are high because the bond will be at a deeper discount.
The one major problem with zeros is that the annual accumulated return is actually considered to be income, and while you don't actually collect that interest until the bond reaches maturity, you still have to pay income tax on it. In other words, the gains on a zero are not treated as capital gains, instead they are considered to be interest.
How To Buy or Sell It
Zerocoupon securities can be bought through most full service or discount brokers, commercial banks, and some other financial intermediaries.
Strengths

Weaknesses

Three Main Uses


Investing
All About Zero Coupon Bonds
Zerocoupon bonds are bonds that do not make any interest payments (which investment professionals often refer to as the "coupon") until maturity. For investors, this means that if you make an ... 
Investing
How Are ZeroCoupon Municipal Bonds Taxed?
What every investor needs to know about taxes and zerocoupon muni bonds. 
Investing
How Do I Calculate Yield To Maturity Of A Zero Coupon Bond?
Yield to maturity is a basic investing concept used by investors to compare bonds of different coupons and times until maturity. 
Investing
ZeroCoupon Bond
A zerocoupon bond or ‘no coupon’ bond is one that does not disburse regular interest payments. Instead, the investor buys the bond at a steep discount price; that is, at a price ... 
Investing
Understanding Bond Prices and Yields
Understanding this relationship can help an investor in any market. 
Investing
Comparing Yield To Maturity And The Coupon Rate
Investors base investing decisions and strategies on yield to maturity more so than coupon rates. 
Investing
Risks To Consider Before Investing In Bonds
Make sure you understand the risks associated with bonds before making an investment decision. 
Investing
Explaining the Coupon Rate
Coupon rate is the stated interest rate on a fixed income security.