REITs are Switching to Swap Futures to Free Up Cash
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Eris SOFR Margin Savings

CME Clearing requires participants to post substantially more margin to collateralize interest rate swap positions than they do for Eris SOFR Swap futures. Thus, using Eris SOFR instead of swaps enables REITs to achieve equivalent market exposure while encumbering much less margin. 

For example, Figure 1 shows recent margin savings of 59-72% between positions of $100 million of Eris SOFR (1,000 contracts) and equivalently-structured interest rate swaps, by tenor.

Eris SOFR margin savings

Eris SOFR SWAPs
Figure 1 Source: Eris Innovations

As another example, inspired by the April 22 trading activity, we can calculate the theoretical margin savings from using Eris SOFR instead of pay-fixed interest rate swaps for $3 billion, split equally between 5-year and 10-year tenors. As shown in Figure 2, a REIT would post $43.5 million in Eris SOFR margin versus $134 million for swaps, more than $90 million less.

Margin savings
Figure 2

How much can REITs save overall by switching to swap futures?

To calculate savings, we dug into the public filings of the top 20 Residential Mortgage REITs from the recent BTIG Mortgage Finance Roundup. Based on public filings, we calculate the following, as of March 31, 2024:

  • 14 REITs have interest rate swaps positions, with a total notional value of $141 billion

  • 84% of the swaps, $119 billion, can be readily replaced by Eris SOFR Swap futures (i.e., cleared swaps, indexed to SOFR, with tenor 10 years or less)

Using the CME CORE margin calculator tool with reasonable assumptions, we estimate the following:

  • The REITs collectively post $2.4 billion for these $119 billion of “addressable swap positions”

  • Eris SOFR margin for nearly-equivalent risk exposure would be $0.95 billion ($1.5 billion lower, or 63%)

Finally, to translate margin reduction into annual savings, we multiply the margin reduction by each firm’s dividend yield, as we believe it’s the appropriate discount rate for evaluating the value of excess cash for highly-levered entities. Thus, we arrive at our final conclusions:

  • By replacing their SOFR-based swaps inside of 10 years with Eris SOFR Swap futures, top Residential Mortgage REITs could reduce their posted margin by $1.5 billion, a meaningful number for a sector with total capitalization of approximately $34 billion.

  • This results in savings of $197 million annually, applying the dividend yield as the cost of capital. 

It’s worth noting, of course, that more than 80% of the savings are attributable to the two largest participants, Annaly and AGNC, each of which can save well over $300 million in margin, confirming BTIG’s estimate. That said, the other 12 REITs can reduce margin by nearly $270 million (compared to a market cap of $17 billion), in each case with amounts material to the size of the firm.

As more firms switch to Eris SOFR swap futures, and the market readily absorbs surges in Eris SOFR activity, it’s clear that awareness is building around the cash-saving benefits. Soon, the momentum-building news we’re seeing now could become less eye-catching and more routine.  

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