{
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  "id": "fixed-variable-defi-borrowing",
  "canonical": "https://degreesofsatoshi.com/encyclopedia/fixed-variable-defi-borrowing/",
  "collection": "defi",
  "title": "Fixed and variable DeFi borrowing: which risk does a fixed rate remove?",
  "description": "Compare rates that change over time with fixed-term obligations, without treating fixed interest as fixed total risk.",
  "aliases": [
    "fixed rate vs variable rate DeFi loans",
    "fixed maturity debt versus changing borrowing rates"
  ],
  "dates": {
    "published": "2026-10-02",
    "modified": "2026-10-02",
    "verified": "2026-10-02T19:18:00.092Z",
    "dataAsOf": "2026-10-02"
  },
  "authorship": {
    "publisher": "Degrees of Satoshi editorial project",
    "process": "AI-assisted research and drafting with a separate automated source-verification pass; no external expert or named human review is implied."
  },
  "quickAnswer": {
    "text": "Variable-rate borrowing accrues costs under a rate that can change with market conditions. Fixed-term borrowing sets an obligation tied to a maturity and execution price under its specific design. A fixed rate can make one cost more predictable, but collateral can still be liquidated and an early exit can depend on market liquidity.",
    "claimId": "fixed-variable-defi-borrowing-quick-answer",
    "sourceIds": [
      "x425-defi-aave-liquidity",
      "x425-defi-morpho-fixed"
    ]
  },
  "keyFacts": [
    {
      "label": "Variable",
      "value": "Aave supply and borrowing rates respond to pool conditions.",
      "sourceIds": [
        "x425-defi-aave-liquidity"
      ],
      "id": "variable",
      "claimId": "fixed-variable-defi-borrowing-fact-variable"
    },
    {
      "label": "Fixed term",
      "value": "Morpho Midnight trades units representing loan-token obligations at maturity.",
      "sourceIds": [
        "x425-defi-morpho-fixed"
      ],
      "id": "fixed-term",
      "claimId": "fixed-variable-defi-borrowing-fact-fixed-term"
    },
    {
      "label": "Early exit",
      "value": "The documented fixed-term design depends on secondary liquidity for early trading exits.",
      "sourceIds": [
        "x425-defi-morpho-fixed"
      ],
      "id": "early-exit",
      "claimId": "fixed-variable-defi-borrowing-fact-early-exit"
    }
  ],
  "prerequisites": [
    "utilization-and-borrowing-rates"
  ],
  "sections": [
    {
      "id": "example",
      "heading": "Translate a discount into a period cost",
      "sourceIds": [
        "x425-defi-morpho-fixed"
      ],
      "paragraphs": [
        "In a simplified fixed-term example, a borrower receives 970 loan tokens now and owes 1,000 at maturity. The 30-token difference is about 3.093% of the 970 received for that term, before fees. It is not 3% of the amount received, and it is not an annual rate unless the term and annualization method justify that label.",
        "A variable loan’s total cost instead depends on the path of its rates and balances."
      ]
    },
    {
      "id": "maturity",
      "heading": "A due date changes the operational obligation",
      "sourceIds": [
        "x425-defi-morpho-fixed"
      ],
      "paragraphs": [
        "The Midnight documentation says unpaid debt can be liquidated after maturity, while collateral health can trigger liquidation earlier. A borrower therefore needs both an ongoing collateral plan and an understanding of repayment timing. Fixed does not mean indefinite."
      ]
    },
    {
      "id": "compare",
      "heading": "Compare the full obligation",
      "sourceIds": [
        "x425-defi-morpho-fixed",
        "x425-defi-aave-liquidity"
      ],
      "paragraphs": [
        "Use the same debt asset, term and fee assumptions. For an early exit, inspect actual offers rather than assuming the original rate is available in reverse. Lenders also face the collateral and loss-allocation rules of the selected fixed-term market."
      ]
    }
  ],
  "faq": [
    {
      "question": "Does a fixed borrowing rate prevent liquidation?",
      "answer": "No. It fixes a pricing feature of the obligation, not the future value of its collateral.",
      "sourceIds": [
        "x425-defi-morpho-fixed"
      ]
    }
  ],
  "claims": [
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      "id": "fixed-variable-defi-borrowing-quick-answer",
      "articleSlug": "fixed-variable-defi-borrowing",
      "statement": "Variable-rate borrowing accrues costs under a rate that can change with market conditions. Fixed-term borrowing sets an obligation tied to a maturity and execution price under its specific design. A fixed rate can make one cost more predictable, but collateral can still be liquidated and an early exit can depend on market liquidity.",
      "sourceIds": [
        "source-1c9a4ee4b0c4a761",
        "source-d15541e8b3aa8941"
      ],
      "sourceLocators": [
        {
          "sourceId": "source-1c9a4ee4b0c4a761",
          "locator": "Supply; Borrow; Repay"
        },
        {
          "sourceId": "source-d15541e8b3aa8941",
          "locator": "Fixed-rate model; maturity; risks"
        }
      ],
      "scope": {
        "collection": "defi",
        "dataAsOf": "2026-10-02",
        "blockHeight": null
      },
      "qualification": "",
      "evidenceStatus": "documented",
      "verification": {
        "status": "verified",
        "method": "independent automated source review",
        "checkedAt": "2026-10-02T19:18:00.092Z",
        "reviewer": "Independent automated verification — Codex root, separate from the DeFi drafting agent",
        "notes": [
          "Checked Morpho Midnight fixed-term debt, maturity liquidation and early-exit liquidity;30/970≈3.093% perterm, not automatically annual rate."
        ]
      }
    },
    {
      "id": "fixed-variable-defi-borrowing-fact-variable",
      "articleSlug": "fixed-variable-defi-borrowing",
      "statement": "Variable: Aave supply and borrowing rates respond to pool conditions.",
      "sourceIds": [
        "source-1c9a4ee4b0c4a761"
      ],
      "sourceLocators": [
        {
          "sourceId": "source-1c9a4ee4b0c4a761",
          "locator": "Supply; Borrow; Repay"
        }
      ],
      "scope": {
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      "evidenceStatus": "documented",
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        "checkedAt": "2026-10-02T19:18:00.092Z",
        "reviewer": "Independent automated verification — Codex root, separate from the DeFi drafting agent",
        "notes": [
          "Checked Morpho Midnight fixed-term debt, maturity liquidation and early-exit liquidity;30/970≈3.093% perterm, not automatically annual rate."
        ]
      }
    },
    {
      "id": "fixed-variable-defi-borrowing-fact-fixed-term",
      "articleSlug": "fixed-variable-defi-borrowing",
      "statement": "Fixed term: Morpho Midnight trades units representing loan-token obligations at maturity.",
      "sourceIds": [
        "source-d15541e8b3aa8941"
      ],
      "sourceLocators": [
        {
          "sourceId": "source-d15541e8b3aa8941",
          "locator": "Fixed-rate model; maturity; risks"
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      ],
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        "checkedAt": "2026-10-02T19:18:00.092Z",
        "reviewer": "Independent automated verification — Codex root, separate from the DeFi drafting agent",
        "notes": [
          "Checked Morpho Midnight fixed-term debt, maturity liquidation and early-exit liquidity;30/970≈3.093% perterm, not automatically annual rate."
        ]
      }
    },
    {
      "id": "fixed-variable-defi-borrowing-fact-early-exit",
      "articleSlug": "fixed-variable-defi-borrowing",
      "statement": "Early exit: The documented fixed-term design depends on secondary liquidity for early trading exits.",
      "sourceIds": [
        "source-d15541e8b3aa8941"
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      "sourceLocators": [
        {
          "sourceId": "source-d15541e8b3aa8941",
          "locator": "Fixed-rate model; maturity; risks"
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        "checkedAt": "2026-10-02T19:18:00.092Z",
        "reviewer": "Independent automated verification — Codex root, separate from the DeFi drafting agent",
        "notes": [
          "Checked Morpho Midnight fixed-term debt, maturity liquidation and early-exit liquidity;30/970≈3.093% perterm, not automatically annual rate."
        ]
      }
    }
  ],
  "sources": [
    {
      "id": "x425-defi-aave-liquidity",
      "label": "LiquidityPool",
      "publisher": "Aave",
      "url": "https://aave.com/docs/aave-v3/concepts/liquidity-pool",
      "locator": "Supply; Borrow; Repay",
      "note": "Pooled supply/collateral interest and repayment asset.",
      "version": "Documentation retrieved for the 2026-10-02 editorial scope; content hash recorded",
      "checkedAt": "2026-10-02T18:53:21.761Z",
      "contentSha256": "cdf88867bba9c9025d998e8b31713ea0de41e0d4a8c7caaa1593f065fd242077",
      "recordId": "source-1c9a4ee4b0c4a761"
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    {
      "id": "x425-defi-morpho-fixed",
      "label": "Fixed Rate Markets (Midnight)",
      "publisher": "Morpho",
      "url": "https://docs.morpho.org/developers/midnight/get-started/",
      "locator": "Fixed-rate model; maturity; risks",
      "note": "Dated documentation example of fixed-term lending mechanics, not an availability guarantee.",
      "version": "Documentation retrieved for the 2026-10-02 editorial scope; content hash recorded",
      "checkedAt": "2026-10-02T18:53:22.486Z",
      "contentSha256": "1372e2e51828ee7876bbb3af19ee99c92510f4a68f9d2e35126969e48548b175",
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  "related": {
    "articles": [
      "defi-debt-refinancing",
      "principal-yield-tokens",
      "lending-liquidity-vs-solvency",
      "bad-debt-socialization"
    ],
    "dossiers": [],
    "wallets": []
  },
  "revisionHistory": [
    {
      "date": "2026-10-02",
      "kind": "published",
      "summary": "First publication after primary-source research and separate automated verification."
    }
  ],
  "citation": "Degrees of Satoshi editorial project. “Fixed and variable DeFi borrowing: which risk does a fixed rate remove?.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/fixed-variable-defi-borrowing/"
}