2.1 Interest Rate Risk and Bond Price Inverse Relationship

Why interest rate risk matters on the UCP exam

Module 1 — Fundamentals of Investments is about 25% of the TOAP UITF Certification Program (UCP) Qualifying Exam. Interest rate risk sits at the center of that module because Philippine UITF fixed-income and multi-asset funds hold peso government and corporate debt that is marked to market. When secondary-market yields change, bond prices change, and the fund’s net asset value per unit (NAVPU) changes even if no units are redeemed and no coupon is missed.

As a prospective Certified UITF Marketing Person, you must explain to clients that a peso bond fund is not a deposit, is not PDIC-insured, and can lose market value when interest rates rise. That conversation starts with one non-negotiable relationship: bond prices and market interest rates move in opposite directions for outstanding fixed-rate bonds.

Fixed coupon, floating market yield

A standard fixed-rate bond pays a coupon that does not change after issuance. Example: a Republic of the Philippines (ROP) or Bureau of the Treasury peso-denominated bond with a face (par) value of PHP 100,000 and a 6% annual coupon pays PHP 6,000 of interest each year until maturity (exact payment frequency can be semi-annual in practice; the exam concept is the same).

What does change every day in the secondary market is the yield investors require for similar risk and maturity. That required yield is often called the market interest rate, market yield, or yield to maturity for bonds of that type. The market yield is influenced by:

• BSP policy rate decisions and forward guidance
• Inflation expectations in the Philippines
• Supply of Philippine Treasury bills and bonds at auction
• Credit conditions for corporate issuers
• Global risk appetite and foreign investor demand for peso assets

Because the bond’s contractual coupon is locked, the only way the market can raise or lower the bond’s effective return for a new buyer is by changing the price the buyer pays.

The inverse relationship (memorize this)

This is interest rate risk in its pure price form: the risk of an adverse change in market value caused by a change in yields. For a long-only bond holder or a fixed-income UITF participant, the classic adverse move is rates up → prices down → NAVPU down.

Worked intuition (no calculator required)

Suppose two otherwise identical peso bonds each have PHP 100,000 face value and one year left to maturity, and both repay face at maturity. Bond A pays a 5% coupon (PHP 5,000). Bond B is a new issue that must offer 7% because market rates just rose.

A rational investor will not pay full PHP 100,000 for Bond A when Bond B offers PHP 7,000 of interest for the same remaining life and credit profile. Bond A’s price is bid down until its total expected return (coupon plus capital gain as price recovers toward par at maturity) is competitive with 7%. That price decline is the inverse relationship in action.

If instead market rates fall to 3%, Bond A’s 5% coupon looks generous. Investors bid its price above par; the capital loss from buying above par and being repaid only PHP 100,000 at maturity offsets the high coupon so the net yield compresses toward 3%.

BSP policy rates and Philippine bond markets

The BSP sets the stance of monetary policy primarily through its policy interest rate framework. When the BSP tightens (raises policy rates) to fight inflation, short-term money-market rates typically rise and the yield curve often shifts upward. Higher government-security yields flow into:

• Treasury bills and Treasury bonds in the secondary market
• Pricing of peso corporate bonds and long-term negotiable certificates of deposit
• Required returns used by trust entities when valuing fixed-income holdings inside UITFs

When the BSP eases (cuts policy rates), the opposite pattern often appears: market yields trend lower and existing higher-coupon bonds reprice higher. Marketing personnel should never promise clients that a rate cut will always lift NAVPU immediately—curve shape, credit spreads, and fund duration all matter—but the direction of the price-yield link remains inverse for fixed-coupon holdings.

UITF mark-to-market link

Under BSP UITF rules and Philippine financial reporting practice for tradeable trust portfolios, eligible fixed-income securities in UITFs are generally valued at fair value / marked to market on a regular (typically daily) basis. Therefore:

1. BSP or market yields rise.
2. Bond prices in the portfolio fall.
3. Fund net assets fall.
4. NAVPU falls for participants who remain invested.

No coupon default is required for this loss to appear. It is a paper (unrealized) mark-to-market loss unless the fund sells; it is still a real economic risk for a client who redeems while prices are down.

What makes interest rate risk larger or smaller?

Not every bond moves the same amount when yields change. For exam purposes, hold these directional rules:

Money market UITFs that hold short-maturity instruments (remaining maturity limits and weighted average portfolio life limits under Circular 1152) generally show smaller NAVPU swings from a given yield shift than a long-duration bond fund. That is why risk profiling maps conservative clients toward shorter fixed-income or money-market products and growth-oriented clients toward longer bond or multi-asset exposures—with full risk disclosure.

Holding to maturity vs selling early

A common client misconception: “If I don’t sell, interest rate risk does not exist.” Partially true, partially false.

• If the issuer pays all coupons and repays face at maturity, and if the investor holds a single bond to maturity, interim price swings do not change the contractual cash flows received (ignoring reinvestment of coupons).
• But UITF participants do not “hold one bond to maturity” as a legal package. They own units priced off the fund’s daily NAVPU. Redeeming units crystallizes the mark-to-market price. Even without redemption, reported performance and suitability conversations must reflect interim volatility.

Also distinguish price risk (market value falls when yields rise) from reinvestment risk (when yields fall, coupons and maturing principal are reinvested at lower rates). Rising-rate environments hurt prices; falling-rate environments help prices but can hurt long-term reinvestment income. Exam questions often test whether you can name which risk dominates in which scenario.

Exam traps for this section

1. Forgetting the inverse relationship — saying bond prices rise when rates rise (false for fixed-rate outstanding bonds).
2. Confusing new issues with old bonds — new bonds are issued at coupons near current market rates; outstanding bonds reprice.
3. Treating UITFs like deposits — deposits may reprice interest paid to the depositor; bond funds reprice the asset value.
4. Assuming only credit events cause losses — interest-rate marks create gains/losses without default.
5. Ignoring maturity — a 10-year peso bond typically moves more than a 91-day T-bill for the same yield shock.

Client-facing one-liner (practice saying it)

“When market interest rates go up, the market value of fixed-rate bonds already in the fund tends to go down, so the UITF’s NAVPU can decline even if the government or company still pays its coupons on time.”