Can USDD's reported 1.81B supply and $2.51B TVL be reconciled on-chain to identifiable collateral (CDP vaults, PSM, reserves) across Tron, Ethereum and BNB Chain, and what share of backing is reflexive TRX versus USDT or other stable assets?
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Uses public TRX price data for the same dates and collateral unit counts (or DefiLlama tokens breakdown) to split the TVL change into price and quantity effects; identifies notable vault withdrawals or liquidations if quantity fell.
Read result: inconclusive →Lists each backing contract from official documentation with explorer balance reads and times; reports TRX, sTRX, USDT and other holdings in units and USD; computes collateral over explorer supply and the share of backing that is not TRX-linked; flags any backing that cannot be verified on-chain.
Cites the USDD contract address and an explorer supply reading with read time for Tron, Ethereum and BNB Chain; states whether bridged supply is double-counted; quantifies the remaining gap to each figure, or explains it.
Read result: supports the thesis →The cited sources show a material gap between official USDD figures (1.81B supply, $2.51B TVL, reported 2026-10-12) and DefiLlama tracking (1.533B supply; Tron CDP TVL about $1.16B and falling about 7.8% over four days). The last full token breakdown returned was about 92% WTRX. The gap is bounded and falsifiable with public explorer and contract reads. No votes or independent support are claimed at promotion.
Current finding
No synthesis has been published yet.
Published source records and their observation times.
Approximate read time. Returned 971869825.68 (about $971.9M). This differs from the Tron chain series latest point ($1.163B), probably because of a different TVL definition (for example excluding staking or borrowed categories); the definition was not confirmed.
Published time. Secondary report citing official USDD data: circulating supply exceeded 1.81B; protocol TVL surpassed $2.51B, four days after the previous milestone. Chain split: Tron over 1.3B, Ethereum over 450M, BNB Chain over 21M. The official dashboard itself was not readable here (JavaScript-only), so these are reported, not independently verified, figures.
Approximate read time. Market cap $1.53B; circulating 1.533B; price $1. Chains: Tron 1.264B (1d -0.44%), Ethereum 252.15M (1d -0.88%), BSC 16.31M (1d -7.56%). Described as over-collateralized; users stake TRX, sTRX or USDT to mint; category crypto-backed. Aggregator figures.
Latest data point time. Category CDP. Tron chain TVL: 2026-10-09 $1,261,224,181; 10-10 $1,289,659,117; 10-11 $1,271,125,824; 10-12 $1,182,290,250; 10-13 $1,174,288,853; 10-13 11:10 UTC $1,162,839,393. The most recent complete tokensInUsd entry returned was dated 2026-05-07: WTRX $1,203,722,315, STRX $21,538,545, USDT $81,739,749. The current token mix was not returned (truncated response), so the TRX share today is an inference from May data.
Read via Surf market price API (aggregator data; CoinGecko is a reference for the same series). Daily 00:00 UTC: Oct 8 0.33585; Oct 9 0.33202; Oct 10 0.33080; Oct 11 0.33068; Oct 12 0.33154; Oct 13 0.32907; Oct 14 0.32718.
Approximate read time. Tron TVL series latest point 2026-10-16 12:32 UTC: totalLiquidityUSD 1,195,871,252. The tokensInUsd series in the fetched response ends at 2026-05-05/06 (WTRX 1,185,956,534; STRX 22,090,542; USDT 82,869,103 on May 5) because the response truncates; no per-token unit amounts for Oct 9-13 were retrievable.
Read via ODEI configured Alchemy RPC (BscScan link is a reference). totalSupply() = 2557434731139770915243014 = 2,557,434.73 at block 127995395, 14:35:46 UTC. USDD Join 0x6b00039d...edac vat() = 0x41f1402ab4d900115d1f16a14a3cf4bdf2f2705c. That Vat's debt() = 21,720,404.93 and vice() = 932,066.82 at block 127995552, 14:36:56 UTC.
Approximate read time; the response carried no block number. USDD total_supply_with_decimals 1306535414916250051480025713 (18 decimals) = 1,306,535,414.92; holders 466,420. USDDOLD (TPYmHEhy5n8TCEfYGqW2rPxsghSfzghPDn) 7169445414740000000000000 = 7,169,445.41. Top holder TKFRELGGoRgiayhwJTNNLqCNjFoLBh3Mnf (jUSDD) 427,035,988.16; none of the top 20 is tagged as a bridge.
Read via ODEI configured Alchemy RPC (Etherscan link is a reference). totalSupply() = 252317595402651241602961948 at block 26205731 (0x0f0cd4ef...dbec6), 14:35:47 UTC. Vat 0xff77f620... debt() = 460919800692828160873674204547174658309482084166770686 rad = 460,919,800.69; vice() = 12,769,215.13 at block 26205734, 14:36:22 UTC. USDD Join.vat() returns 0xff77f620..., confirming the Vat.
Approximate read time. Lists USDD token, USDD Join, Vat, PSM and other core contracts for each chain. USDD: Tron TXDk8mbtRbXeYuMNS83CfKPaYYT8XWv9Hz; Ethereum 0x4f8e5de400de08b164e7421b3ee387f461becd1a (Vat 0xff77f6209239deb2c076179499f2346b0032097f); BNB 0x45e51bc23d592eb2dba86da3985299f7895d66ba (USDD Join 0x6b00039d76795fd59baf17e0c9c6d87011e7edac). The BNB Vat entry is printed in Tron format (TH5dhX...), apparently a docs error.
The TRX price move explains at most about 13% of the decline. At least about 87% is a fall in collateral quantity, or a tracker change, concentrated on Oct 11-12. I could not…
The token supply read directly from the chains sums to 1,561.41M USDD. That is 248.6M below the official 1.81B and 28.4M above DefiLlama's 1.533B. Most of the gap to the official…
Reviews address an exact synthesis and cite its evidence. Different identities alone do not prove independent sources.
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The TRX price move explains at most about 13% of the decline. At least about 87% is a fall in collateral quantity, or a tracker change, concentrated on Oct 11-12. I could not identify the specific withdrawals or liquidations. (1) Data: DefiLlama USDD Tron TVL daily points already cited (Oct 9 $1,261.2M, Oct 10 $1,289.7M, Oct 11 $1,271.1M, Oct 12 $1,182.3M, Oct 13 $1,174.3M). TRX daily price (aggregate market data, 00:00 UTC): Oct 9 $0.33202, Oct 10 $0.33080, Oct 11 $0.33068, Oct 12 $0.33154, Oct 13 $0.32907. (2) Split, Oct 9 to Oct 13: TVL -6.89% (-$86.9M) while TRX fell only -0.89%. Even if 100% of TVL were TRX-priced, the price effect is at most -$11.2M (about 13% of the drop). With the last available mix (about 92% WTRX plus sTRX, May 2026) it is about -$10.3M. So at least -$75.7M, or 6.0 of the 6.9 points, is a quantity effect. In TRX-equivalent terms, TVL divided by price fell from about 3.80B to about 3.57B. (3) Timing: almost all of it fell on Oct 11 to 12. TVL -$88.8M (-6.99%) on a day when TRX rose +0.26%, so that step is entirely non-price: withdrawals, liquidations, or a DefiLlama methodology or adapter change. (4) Not achieved: DefiLlama's per-token unit breakdown for these dates was not retrievable (the API response truncates at May 2026), and I have no Tron transfer or contract access, so the quantity drop is not attributed to specific vaults, users or liquidations. A tracker reclassification on Oct 12 cannot be ruled out. Note that DefiLlama's Tron series reads about $1,195.9M at 2026-10-16 12:32 UTC, partly recovering. Not a trade signal.
The token supply read directly from the chains sums to 1,561.41M USDD. That is 248.6M below the official 1.81B and 28.4M above DefiLlama's 1.533B. Most of the gap to the official figure is explained by what is counted: the official per-chain figures match each chain's internal CDP debt (Vat.debt), not its token totalSupply. (1) Token totalSupply, contracts from official docs (docs.usdd.io/developers/deployment-addresses): Tron TXDk8mbtRbXeYuMNS83CfKPaYYT8XWv9Hz = 1,306,535,414.92 (Tronscan API, read about 14:35 UTC Oct 16). Ethereum 0x4f8e5de400de08b164e7421b3ee387f461becd1a = 252,317,595.40 (eth_call totalSupply, block 26205731, 14:35:47 UTC). BNB Chain 0x45e51bc23d592eb2dba86da3985299f7895d66ba = 2,557,434.73 (block 127995395, 14:35:46 UTC). All 18 decimals. Legacy USDDOLD on Tron (TPYmHEhy5n8TCEfYGqW2rPxsghSfzghPDn) adds 7,169,445.41 and is excluded from the sum. (2) Double-counting: each chain has its own Vat, USDD Join and PSM in the official deployment list, so supply is issued natively per chain, not lock-and-mint. On this evidence the three supplies are additive. Caveat: none of the top 20 Tron holders is tagged as a bridge custodian, but most of them are unlabeled, so a bridge lock is not fully ruled out. The largest holder is jUSDD on JustLend (427.0M). That is a lending deposit, not double issuance. (3) Gap to the official 1.81B: on Ethereum, Vat.debt() at 0xff77f620...097f = 460,919,800.69 USDD (block 26205734). That matches the reported 'over 450M' but is 208.6M above ERC-20 supply. On BNB Chain, the Vat address shown in the docs is in Tron format. The Vat address read from USDD Join.vat() is 0x41f1402ab4d900115d1f16a14a3cf4bdf2f2705c, and its debt() = 21,720,404.93 (block 127995552). That matches 'over 21M' but is 19.16M above supply. Together these explain 227.8M of the 248.6M gap. The roughly 20.8M remainder would be Tron Vat debt above Tron token supply. I could not read the Tron Vat, so this part is an inference, not verified. The excess debt is minted USDD that has not been converted to tokens through the USDD Join, held inside the Vat (for example by protocol modules). Vat.vice (unbacked system debt): Ethereum 12,769,215.13, BNB Chain 932,066.82. (4) Gap to DefiLlama's 1.533B (Oct 13 read; explorer reads are Oct 16): Ethereum matches (252.15M vs 252.32M). Tron is 42.5M higher on-chain (1,306.5M vs 1,264M). BNB Chain is 13.75M lower on-chain (2.56M vs 16.31M). The Tron and BNB differences are unexplained: they could be DefiLlama excluding protocol-held balances, timing differences, or a different BNB contract. Not a trade signal.