Ask Emily: Are exchangeable CMOs a good choice?

The NCUA's recent approval of exchangeable CMOs opens up another investment vehicle for credit unions. Depending upon your investment portfolio and your outlook for interest rates these instruments may have a place in your portfolio.


With the NCUA’s recent approval of exchangeable CMOs for credit unions, could you tell me more about them and whether or not they are a good choice?

ALM First Financial Advisors has been following this issue for some time, and we were pleased that the NCUA has approved exchangeable CMOs as legal investments. We have been a strong supporter of the rule change because the exchange features provide investors with more flexibility and, as a result, better trade execution.

I wrote a column about exchangeable CMOs last year, and the issue is even more relevant now (June 2003). This investment represents a type of structured mortgage-backed security, which can be “exchanged” into another CMO that has different principal and/or interest characteristics. Exchangeables are relatively new – first created in the mid-1990s, but they have become well-accepted in the market and most deals contain them. With rates moving up, the built-in flexibility that exchangeable CMOs offer makes them especially desirable.

To understand the advantages for investors, it’s helpful to look at the features from the issuer’s side: When issuing a two-year PAC CMO with a coupon of 3.5 percent against 5.5 percent collateral, the issuer must create an interest only (IO) strip. This derivative is the interest-only payments of the coupon difference of 5.5 percent, less 3.5 percent. Although an issuer may not be able to sell a bond with a 3.5 percent coupon and 2 percent yield because the premium will be too high, a 3.0 percent coupon would be more appealing to investors. Because of its exchangeable feature, the issuer can cut an additional 0.50 percent from the IO strip without going to the secondary mortgage market to re-REMIC the bond. Thus, it is more cost-effective for the issuer to alter the bond’s characteristics because the option is “free” to the investor; that is, purchase yields are comparable to non-exchangeable securities.

Now, look at the example from an investor’s side: For an exchange fee (typically 1/32), an investor can exchange a CMO with a coupon of 3.5 percent for a CMO with a coupon of 3.0 percent that has comparable traits and an IO strip of 0.50 percent. Regulations prohibit credit unions from holding IO strips, so the dealer will retain or sell the strip to a separate account and exchange the CMO back to the original investor. As a result, the investor has a security with a new coupon, but the CUSIP doesn’t change. (Note that the original PAC CMO with the 3.5 percent coupon is the combination of the newly created PAC CMO with a 3.0 percent coupon and the IO strip. But separately, the IO strip would be an illegal investment for credit unions.)

Exchangeable securities are becoming more popular. By modifying NCUA’s rules, parts 703 and 704, the Agency allowing credit unions to enjoy the flexibility of exchangeables without adding risk to their balance sheets. If the embedded option is not executed, the make up of the exchangeable tranche and its risk characteristics are the same as non-exchangeable CMOs.




July 26, 2004



No comments have been posted yet. Be the first one.