By the Numbers
Strong 30-year excess returns in June
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Agency MBS outperformed their Treasury hedges in June, continuing a trend that started in mid-May. Conventional 30-year excess returns came in positive across the stack with up-in-coupon positions generally faring better. Returns for Ginnie Mae 30-year MBS came in strongest in 3.5%s and 4.0%s and weakest in 2.0%s and 2.5%s. Conventional 15-year MBS posted negative excess returns for 1.5%s and only modestly positive for 2.0%s through 3.5%s, and the sector slightly underperformed Treasuries as a result. But 15-year MBS in 4.0% and higher coupons posted strong returns, comparable to 30-year MBS. Meanwhile, the FDIC has sold over two-thirds of its MBS portfolio and over 75% of its 1.5% and 2.0% pools, so future selling will focus more on 30-year 2.5%s and 3.0%s, 15-year 2.0%s and 2.5%s, and 20-year 2.0%s.
Strong 30-year excess return in June pull year-to-date results positive
Conventional 30-year MBS outperformed treasury hedges across the coupon stack in June (Exhibit 1). The strong performance also pulled year-to-date excess returns positive for all coupons. Monthly returns exceeded 50 bp for all coupons 3.5% and higher, and the 2.5% and 3.0% coupons were close to that mark. Only the 1.5% and 2.0% coupons lagged a little, possibly pulled down by FDIC selling in those coupons. Returns for the 5.0% coupon, which has been the production coupon for most of the year, have been the lowest year-to-date across coupons.
Exhibit 1. Conventional 30-year MBS excess returns (%)
Excess returns reported by the Bloomberg Barclays MBS Index, through 6/30/2023.
Source: Bloomberg, Santander US Capital Markets
Ginnie Mae 30-year excess returns also were positive in June (Exhibit 2). Like conventional MBS, performance was weakest at the bottom of the coupon stack. But the strongest returns came in the middle of the stack, in 3.5%s and 4.0%s. This may be due to limited supply in those coupons—the Ginnies in the FDIC’s MBS portfolio were mostly 2.0%s, 2.5%, and 3.0%s and most new pool issuance has been in 4.5%s and higher.
Exhibit 2. Ginnie Mae 30-year MBS excess returns (%)
Excess returns reported by the Bloomberg Barclays MBS Index, through 6/30/2023.
Source: Bloomberg, Santander US Capital Markets
Conventional 15-year excess returns did not fare as well as 30-year returns (Exhibit 3). The MBS portfolio the FDIC acquired from Silicon Valley Bank and Signature Bank was overweight 15-year MBS and most was in 3.0% and lower coupons. This may have weighed on performance in those coupons. And projected returns for 15-year MBS have generally been lower than for 30-year MBS, reducing interest in the sector.
Exhibit 3. Conventional 15-year MBS excess returns (%)
Excess returns reported by the Bloomberg Barclays MBS Index, through 6/30/2023.
Source: Bloomberg, Santander US Capital Markets
The FDIC is over halfway done selling agency MBS and CMOs
The FDIC has sold over two-thirds of its agency MBS portfolio (Exhibit 4). Most of the portfolio was held in 3.0% and lower coupons and was heavily invested in shorter duration 15- and 20-year MBS. The selling thus far has been weighted towards lower coupons. The FDIC has sold nearly 85% of its 1.5% coupon pools, including 100% of its 30-year and 20-year pools in that coupon. The FDIC has sold 79% of its 2.0% coupon pools and 70% of its 2.5% pools.
Exhibit 4. The FDIC has sold 69% of its SVB & SBNY Agency MBS portfolio.
Sales through 7/6/2023. Any upsizes included on lists through 6/23/2023.
Source: Black Rock, FDIC, Santander US Capital Markets
The remaining portfolio is more heavily weighted towards higher coupons than at the start of the sales. For example, in the conventional 30-year sector, the FDIC started with $10.3 bn 2.5%s and $6.6 bn 3.0%s, but now owns more 3.0%s than 2.5%s.
The FDIC started selling its CMO portfolio a little later than the MBS pool portfolio and has sold just about 50% (Exhibit 5). Most of the bonds were pass-throughs and sequentials, and the sales have focused on those categories. Over 80% of the pass-through bonds have been sold, and over 45% of the sequential bonds. The sales have included only a small number of PACs, floaters, and sequential Zs. The selling has been weighted a bit more heavily towards conventional CMOs than Ginnie CMOs.
Exhibit 5. The FDIC has sold 50% of its SVB & SBNY Agency MBS portfolio.
Sales through 7/6/2023.
Source: Black Rock, FDIC, Santander US Capital Markets
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