WisdomTree Mortgage Plus Bond Fund (MTGP)

The WisdomTree Mortgage Plus Bond Fund (MTGP) is an income-focused bond fund that holds mortgage-backed securities alongside other fixed-income assets and weights its holdings by dividend yield — meaning it overweights the components paying the highest income relative to their share price.

“A fund that lets income speak louder than index weight”

The dividend-weighting methodology

Most bond funds and bond indices weight holdings by market capitalization or by duration. They ask: what proportion of the total bond market is made up of mortgages versus Treasuries versus corporate bonds? Then they hold each asset class in that proportion.

MTGP inverts that logic. Instead of asking “how much exists,” it asks “how much does it yield?” The fund weights its holdings based on their dividend yield. A mortgage-backed security paying 5% gets a larger share of the portfolio than one paying 3%, regardless of how much of the overall MBS market the 5% security represents.

This approach makes sense for an income-focused investor: the funds paying the most cash distributions in the moment get more of your dollars. On a longer horizon, this also creates a subtle performance effect. High-yielding bonds tend to be older, seasoned pools (in MBS) or beaten-down issues (in other fixed income). The best yields often signal that investors are pricing in some risk, or that the opportunity has already been partially recognized.

What MTGP holds beyond mortgages

The fund is called “Mortgage Plus,” and mortgage-backed securities are the core holding. But “Plus” indicates that MTGP has flexibility to hold other fixed-income assets — US Treasury bonds, agency bonds (bonds issued by government-sponsored enterprises), investment-grade corporate bonds, or other yield-generating instruments. The exact mix is disclosed in the fund’s holdings and adjusted by the manager as opportunities shift.

This flexibility is valuable. In environments where MBS yields fall or spreads tighten (meaning MBS become less attractive relative to other bonds), the manager can pivot toward alternative assets without violating the fund’s mandate. It also means MTGP can capture value in any corner of the fixed-income market where yield is sitting, not just in mortgages.

How the dividend-weighting approach performs

The logic of yield-weighting is seductive: capture the most income, now. But there is a catch. High yield often signals risk. A bond paying 5% when similar bonds pay 4% is usually priced high because of some concern — credit risk, interest-rate sensitivity, liquidity risk, or simply that it is older and closer to maturity. Weighting toward it means tilting toward that risk.

Over a bull market in bonds (rates falling sharply), yield-weighted portfolios often lag cap-weighted indices, because high yields correlate with duration or credit risk that the market is now pricing more kindly. Over a bear market (rates rising), they may perform better, because the high income offsets the price decline.

The fund’s prospectus and fact sheet disclose the historical performance relative to standard bond indices. Comparing MTGP’s total return to a broad bond-market index over multiple years and market conditions is the way to assess whether the dividend-weighting methodology has been a net positive.

Why WisdomTree’s approach matters

WisdomTree is a manager that specializes in non-traditional weighting methodologies. It built its reputation on dividend-weighted equity funds (funds that hold stocks weighted by their dividend payout, not their market cap), and it has applied similar logic to fixed income. The dividend-weighting approach aligns the fund with the explicit interests of income-seeking investors and creates a natural feedback loop: the highest-yielding bonds are the fund’s largest positions, ensuring the portfolio stays focused on income generation.

This differs from a conventional bond fund, where income is incidental to credit quality or duration management. In MTGP, income is the primary criterion, and all other factors are secondary.

Distribution and the mechanics of income

MTGP distributes income monthly, just as most bond funds do. The distribution depends on the income earned by the underlying holdings: the coupons on the mortgages and bonds, plus any short-term capital gains. If the fund rotates aggressively, it may realize capital gains or losses that flow into the monthly distribution.

The yield (the distribution divided by the current share price) is the most important metric for an income investor. A MTGP yielding 4% is paying out 4% of the share price annually in distributions. Whether that yield is sustainable depends on whether the underlying bonds are paying coupons sufficient to cover it, and whether the portfolio’s total return is stable.

Interest rates and the fund’s behavior

As with all fixed-income funds, MTGP’s share price is inverse to prevailing interest rates. Rising rates hurt the value of existing bonds, pushing MTGP’s price down and raising its yield (because the distribution is now spread across a lower share price). Falling rates lift the share price and compress the yield.

The mortgage-backed securities component adds another layer: prepayment risk. When rates fall and homeowners refinance aggressively, the MBS pay off early, and the manager must reinvest the proceeds in a lower-rate environment. This tends to drag on returns and limit the upside from falling rates — a feature that becomes more obvious in very sharp rallies.

How to research MTGP

Begin with WisdomTree’s fact sheet and prospectus. These disclose the fund’s current dividend yield, the average coupon of its holdings, the expense ratio, and the breakdown by asset class (what percentage is mortgages, Treasuries, corporate bonds, etc.).

Check the historical distribution payments over the past two years. Look for consistency: a stable monthly payout suggests reliable underlying income. Volatility might suggest active trading or capital gains being distributed.

Compare MTGP’s total return (price change plus distributions) to a standard bond-market index like the Bloomberg US Aggregate Bond Index over one-year and three-year periods. This shows whether the dividend-weighting methodology has added value above its expense ratio.

Finally, use MTGP as an income-focused core fixed-income holding, not as a total-return bet. Its best use is for investors seeking monthly income with reasonable liquidity, willing to accept the trade-off that yield-weighting may sacrifice some total-return upside in a bull market in order to lock in income in most environments.