diff --git a/CHANGELOG.md b/CHANGELOG.md
index 68e35e97f..f91b51e82 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -60,6 +60,11 @@ All components: make Main the only component that can call `upgradeTo()`
 
 Add `savedPegPrice` to `ICollateral` interface
 
+- cbETH: Fix deploy script to use right defaultThreshold
+- rETH: Fix deploy script to use right defaultThreshold
+- wstETH: Fix deploy script to use right defaultThreshold
+- sfrxETH: Fix deploy script to use right defaultThreshold
+
 ### Trading
 
 - `GnosisTrade`
diff --git a/scripts/deployment/phase2-assets/collaterals/deploy_cbeth_collateral.ts b/scripts/deployment/phase2-assets/collaterals/deploy_cbeth_collateral.ts
index f45ddda0a..65a06dd1a 100644
--- a/scripts/deployment/phase2-assets/collaterals/deploy_cbeth_collateral.ts
+++ b/scripts/deployment/phase2-assets/collaterals/deploy_cbeth_collateral.ts
@@ -54,13 +54,13 @@ async function main() {
     )) as CBEthCollateral__factory
 
     const CBETH_ORACLE_ERROR = fp('0.01') // 1%
-    const oracleError = combinedError(fp('0.005'), CBETH_ORACLE_ERROR) // 0.5% & 1%
+    const oracleError = combinedError(fp('0.005'), CBETH_ORACLE_ERROR) // 0.5% + 1%
 
     collateral = await CBETHCollateralFactory.connect(deployer).deploy(
       {
         priceTimeout: priceTimeout.toString(),
         chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH!,
-        oracleError: oracleError.toString(), // 0.5% & 2%,
+        oracleError: oracleError.toString(), // 0.5% + 2%,
         erc20: networkConfig[chainId].tokens.cbETH!,
         maxTradeVolume: fp('1e6').toString(), // $1m,
         oracleTimeout: '3600', // 1 hr,
@@ -82,13 +82,13 @@ async function main() {
     )) as CBEthCollateralL2__factory
 
     const CBETH_ORACLE_ERROR = fp('0.005') // 0.5%
-    const oracleError = combinedError(fp('0.0015'), CBETH_ORACLE_ERROR) // 0.15% & 0.5%
+    const oracleError = combinedError(fp('0.0015'), CBETH_ORACLE_ERROR) // 0.15% + 0.5%
 
     collateral = await CBETHCollateralFactory.connect(deployer).deploy(
       {
         priceTimeout: priceTimeout.toString(),
         chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH!,
-        oracleError: oracleError.toString(), // 0.15% & 0.5%,
+        oracleError: oracleError.toString(), // 0.15% + 0.5%,
         erc20: networkConfig[chainId].tokens.cbETH!,
         maxTradeVolume: fp('1e6').toString(), // $1m,
         oracleTimeout: '1200', // 20 min
diff --git a/scripts/deployment/phase2-assets/collaterals/deploy_ethx_collateral.ts b/scripts/deployment/phase2-assets/collaterals/deploy_ethx_collateral.ts
index 526d00e67..3648b7d7a 100644
--- a/scripts/deployment/phase2-assets/collaterals/deploy_ethx_collateral.ts
+++ b/scripts/deployment/phase2-assets/collaterals/deploy_ethx_collateral.ts
@@ -52,13 +52,13 @@ async function main() {
     'ETHxCollateral'
   )
 
-  const oracleError = combinedError(ETH_ORACLE_ERROR, ETHX_ORACLE_ERROR) // 0.5% & 0.5%
+  const oracleError = combinedError(ETH_ORACLE_ERROR, ETHX_ORACLE_ERROR) // 0.5% + 0.5%
 
   const collateral = <ETHxCollateral>await ETHxCollateralFactory.connect(deployer).deploy(
     {
       priceTimeout: priceTimeout.toString(),
       chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH,
-      oracleError: oracleError.toString(), // 0.5% & 0.5%
+      oracleError: oracleError.toString(), // 0.5% + 0.5%
       erc20: networkConfig[chainId].tokens.ETHx,
       maxTradeVolume: fp('1e6').toString(), // $1m,
       oracleTimeout: ETH_ORACLE_TIMEOUT.toString(), // 1 hr,
diff --git a/scripts/deployment/phase2-assets/collaterals/deploy_lido_wsteth_collateral.ts b/scripts/deployment/phase2-assets/collaterals/deploy_lido_wsteth_collateral.ts
index fb153f60a..2a5aa04de 100644
--- a/scripts/deployment/phase2-assets/collaterals/deploy_lido_wsteth_collateral.ts
+++ b/scripts/deployment/phase2-assets/collaterals/deploy_lido_wsteth_collateral.ts
@@ -109,7 +109,7 @@ async function main() {
       {
         priceTimeout: priceTimeout.toString(),
         chainlinkFeed: BASE_PRICE_FEEDS.stETH_ETH, // ignored
-        oracleError: BASE_ORACLE_ERROR.toString(), // 0.5% & 0.5% & 0.15%
+        oracleError: BASE_ORACLE_ERROR.toString(), // 0.5% + 0.5% + 0.15%
         erc20: networkConfig[chainId].tokens.wstETH,
         maxTradeVolume: fp('5e5').toString(), // $500k
         oracleTimeout: BASE_FEEDS_TIMEOUT.stETH_ETH, // 86400, ignored
diff --git a/scripts/deployment/phase2-assets/collaterals/deploy_rocket_pool_reth_collateral.ts b/scripts/deployment/phase2-assets/collaterals/deploy_rocket_pool_reth_collateral.ts
index 0a63c2f73..f51555ad7 100644
--- a/scripts/deployment/phase2-assets/collaterals/deploy_rocket_pool_reth_collateral.ts
+++ b/scripts/deployment/phase2-assets/collaterals/deploy_rocket_pool_reth_collateral.ts
@@ -62,13 +62,13 @@ async function main() {
   )
 
   const RETH_ORACLE_ERROR = fp('0.02')
-  const oracleError = combinedError(fp('0.005'), RETH_ORACLE_ERROR) // 0.5% & 2%
+  const oracleError = combinedError(fp('0.005'), RETH_ORACLE_ERROR) // 0.5% + 2%
 
   const collateral = <RethCollateral>await RethCollateralFactory.connect(deployer).deploy(
     {
       priceTimeout: priceTimeout.toString(),
       chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH,
-      oracleError: oracleError.toString(), // 0.5% & 2%
+      oracleError: oracleError.toString(), // 0.5% + 2%
       erc20: networkConfig[chainId].tokens.rETH,
       maxTradeVolume: fp('1e6').toString(), // $1m,
       oracleTimeout: '3600', // 1 hr,
diff --git a/scripts/deployment/phase2-assets/collaterals/deploy_sfrax_eth.ts b/scripts/deployment/phase2-assets/collaterals/deploy_sfrax_eth.ts
index 08fd4b230..02f0fdd56 100644
--- a/scripts/deployment/phase2-assets/collaterals/deploy_sfrax_eth.ts
+++ b/scripts/deployment/phase2-assets/collaterals/deploy_sfrax_eth.ts
@@ -47,7 +47,7 @@ async function main() {
   )
 
   const SFRAXETH_ORACLE_ERROR = fp('0.0002')
-  const oracleError = combinedError(fp('0.005'), SFRAXETH_ORACLE_ERROR) // 0.5% & 0.02%
+  const oracleError = combinedError(fp('0.005'), SFRAXETH_ORACLE_ERROR) // 0.5% + 0.02%
 
   const collateral = <SFraxEthCollateral>await SFraxEthCollateralFactory.connect(deployer).deploy(
     {
diff --git a/scripts/deployment/utils.ts b/scripts/deployment/utils.ts
index 5abd9ecb5..07f238d13 100644
--- a/scripts/deployment/utils.ts
+++ b/scripts/deployment/utils.ts
@@ -14,7 +14,7 @@ export const priceTimeout = bn('604800') // 1 week
 export const revenueHiding = fp('1e-6') // 1 part in a million
 
 export const combinedError = (x: BigNumber, y: BigNumber): BigNumber => {
-  return fp('1').add(x).mul(fp('1').add(y)).div(fp('1')).sub(fp('1'))
+  return x.add(y)
 }
 
 export const validatePrerequisites = async (deployments: IDeployments) => {
diff --git a/scripts/verification/collateral-plugins/verify_cbeth.ts b/scripts/verification/collateral-plugins/verify_cbeth.ts
index 261e1d1ff..7eb4630f6 100644
--- a/scripts/verification/collateral-plugins/verify_cbeth.ts
+++ b/scripts/verification/collateral-plugins/verify_cbeth.ts
@@ -28,7 +28,7 @@ async function main() {
   /********  Verify Coinbase staked ETH - CBETH  **************************/
   if (!baseL2Chains.includes(hre.network.name)) {
     const CBETH_ORACLE_ERROR = fp('0.01')
-    const oracleError = combinedError(fp('0.005'), CBETH_ORACLE_ERROR) // 0.5% & 1%
+    const oracleError = combinedError(fp('0.005'), CBETH_ORACLE_ERROR) // 0.5% + 1%
 
     await verifyContract(
       chainId,
@@ -37,7 +37,7 @@ async function main() {
         {
           priceTimeout: priceTimeout.toString(),
           chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH,
-          oracleError: oracleError.toString(), // 0.5% & 2%
+          oracleError: oracleError.toString(), // 0.5% + 2%
           erc20: networkConfig[chainId].tokens.cbETH!,
           maxTradeVolume: fp('1e6').toString(), // $1m,
           oracleTimeout: '3600', // 1 hr
@@ -53,7 +53,7 @@ async function main() {
     )
   } else if (chainId == '8453' || chainId == '84531') {
     const CBETH_ORACLE_ERROR = fp('0.005')
-    const oracleError = combinedError(fp('0.0015'), CBETH_ORACLE_ERROR) // 0.15% & 0.5%
+    const oracleError = combinedError(fp('0.0015'), CBETH_ORACLE_ERROR) // 0.15% + 0.5%
     await verifyContract(
       chainId,
       deployments.collateral.cbETH,
@@ -61,7 +61,7 @@ async function main() {
         {
           priceTimeout: priceTimeout.toString(),
           chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH,
-          oracleError: oracleError.toString(), // 0.15% & 0.5%,
+          oracleError: oracleError.toString(), // 0.15% + 0.5%,
           erc20: networkConfig[chainId].tokens.cbETH!,
           maxTradeVolume: fp('1e6').toString(), // $1m,
           oracleTimeout: '1200', // 20 min
diff --git a/scripts/verification/collateral-plugins/verify_ethx.ts b/scripts/verification/collateral-plugins/verify_ethx.ts
index 96320dc4d..5fdd7d936 100644
--- a/scripts/verification/collateral-plugins/verify_ethx.ts
+++ b/scripts/verification/collateral-plugins/verify_ethx.ts
@@ -33,7 +33,7 @@ async function main() {
   deployments = <IAssetCollDeployments>getDeploymentFile(assetCollDeploymentFilename)
 
   /********  Verify Stader ETH - ETHx  **************************/
-  const oracleError = combinedError(ETH_ORACLE_ERROR, ETHX_ORACLE_ERROR) // 0.5% & 0.5%
+  const oracleError = combinedError(ETH_ORACLE_ERROR, ETHX_ORACLE_ERROR) // 0.5% + 0.5%
   await verifyContract(
     chainId,
     deployments.collateral.ETHx,
@@ -41,7 +41,7 @@ async function main() {
       {
         priceTimeout: priceTimeout.toString(),
         chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH,
-        oracleError: oracleError.toString(), // 0.5% & 0.5%
+        oracleError: oracleError.toString(), // 0.5% + 0.5%
         erc20: networkConfig[chainId].tokens.ETHx,
         maxTradeVolume: fp('1e6').toString(), // $1m,
         oracleTimeout: ETH_ORACLE_TIMEOUT.toString(), // 1 hr,
diff --git a/scripts/verification/collateral-plugins/verify_reth.ts b/scripts/verification/collateral-plugins/verify_reth.ts
index eab1a87c1..fb756725a 100644
--- a/scripts/verification/collateral-plugins/verify_reth.ts
+++ b/scripts/verification/collateral-plugins/verify_reth.ts
@@ -27,7 +27,7 @@ async function main() {
 
   /********  Verify Rocket-Pool ETH - rETH  **************************/
   const RETH_ORACLE_ERROR = fp('0.02')
-  const oracleError = combinedError(fp('0.005'), RETH_ORACLE_ERROR) // 0.5% & 2%
+  const oracleError = combinedError(fp('0.005'), RETH_ORACLE_ERROR) // 0.5% + 2%
   await verifyContract(
     chainId,
     deployments.collateral.rETH,
@@ -35,7 +35,7 @@ async function main() {
       {
         priceTimeout: priceTimeout.toString(),
         chainlinkFeed: networkConfig[chainId].chainlinkFeeds.ETH,
-        oracleError: oracleError.toString(), // 0.5% & 2%,
+        oracleError: oracleError.toString(), // 0.5% + 2%,
         erc20: networkConfig[chainId].tokens.rETH,
         maxTradeVolume: fp('1e6').toString(), // $1m,
         oracleTimeout: '3600', // 1 hr,
diff --git a/scripts/verification/collateral-plugins/verify_sfrax_eth.ts b/scripts/verification/collateral-plugins/verify_sfrax_eth.ts
index bd8ea69b7..00b0d5ee9 100644
--- a/scripts/verification/collateral-plugins/verify_sfrax_eth.ts
+++ b/scripts/verification/collateral-plugins/verify_sfrax_eth.ts
@@ -27,7 +27,7 @@ async function main() {
 
   /********  Verify sFRAX  **************************/
   const SFRAXETH_ORACLE_ERROR = fp('0.0002')
-  const oracleError = combinedError(fp('0.005'), SFRAXETH_ORACLE_ERROR) // 0.5% & 0.02%
+  const oracleError = combinedError(fp('0.005'), SFRAXETH_ORACLE_ERROR) // 0.5% + 0.02%
 
   await verifyContract(
     chainId,
diff --git a/scripts/verification/collateral-plugins/verify_wsteth.ts b/scripts/verification/collateral-plugins/verify_wsteth.ts
index 3b2a01620..6291d4d5f 100644
--- a/scripts/verification/collateral-plugins/verify_wsteth.ts
+++ b/scripts/verification/collateral-plugins/verify_wsteth.ts
@@ -63,7 +63,7 @@ async function main() {
         {
           priceTimeout: priceTimeout.toString(),
           chainlinkFeed: BASE_PRICE_FEEDS.stETH_ETH, // ignored
-          oracleError: BASE_ORACLE_ERROR.toString(), // 0.5% & 0.5% & 0.15%
+          oracleError: BASE_ORACLE_ERROR.toString(), // 0.5% + 0.5% + 0.15%
           erc20: networkConfig[chainId].tokens.wstETH,
           maxTradeVolume: fp('5e5').toString(), // $500k
           oracleTimeout: BASE_FEEDS_TIMEOUT.stETH_ETH, // 86400, ignored
diff --git a/test/integration/mainnet-test/IssuancePremium.test.ts b/test/integration/mainnet-test/IssuancePremium.test.ts
index 7c014d242..47da79ca6 100644
--- a/test/integration/mainnet-test/IssuancePremium.test.ts
+++ b/test/integration/mainnet-test/IssuancePremium.test.ts
@@ -117,7 +117,7 @@ describeFork(`ETH+ Issuance Premium - Mainnet Forking P${IMPLEMENTATION}`, funct
 
     // SFraxEthCollateral
     const SFraxEthCollateralFactory = await hre.ethers.getContractFactory('SFraxEthCollateral')
-    let oracleError = combinedError(fp('0.005'), fp('0.0002')) // 0.5% & 0.02%
+    let oracleError = combinedError(fp('0.005'), fp('0.0002')) // 0.5% + 0.02%
     const newSfrxETH = <SFraxEthCollateral>await SFraxEthCollateralFactory.deploy(
       {
         priceTimeout: '604800',
@@ -158,7 +158,7 @@ describeFork(`ETH+ Issuance Premium - Mainnet Forking P${IMPLEMENTATION}`, funct
 
     // RethCollateral
     const RethCollateralFactory = await hre.ethers.getContractFactory('RethCollateral')
-    oracleError = combinedError(fp('0.005'), fp('0.02')) // 0.5% & 2%
+    oracleError = combinedError(fp('0.005'), fp('0.02')) // 0.5% + 2%
     const newRETH = <RethCollateral>await RethCollateralFactory.deploy(
       {
         priceTimeout: '604800',