diff --git a/web/components/bet-panel.tsx b/web/components/bet-panel.tsx
index adaa9b19..42d40a25 100644
--- a/web/components/bet-panel.tsx
+++ b/web/components/bet-panel.tsx
@@ -4,7 +4,7 @@ import { partition, sumBy } from 'lodash'
 import { SwitchHorizontalIcon } from '@heroicons/react/solid'
 
 import { useUser } from 'web/hooks/use-user'
-import { BinaryContract, CPMMBinaryContract } from 'common/contract'
+import { CPMMBinaryContract } from 'common/contract'
 import { Col } from './layout/col'
 import { Row } from './layout/row'
 import { Spacer } from './layout/spacer'
@@ -42,7 +42,7 @@ import { isIOS } from 'web/lib/util/device'
 import { ProbabilityInput } from './probability-input'
 
 export function BetPanel(props: {
-  contract: BinaryContract
+  contract: CPMMBinaryContract
   className?: string
 }) {
   const { contract, className } = props
@@ -91,7 +91,7 @@ export function BetPanel(props: {
 }
 
 export function BetPanelSwitcher(props: {
-  contract: BinaryContract
+  contract: CPMMBinaryContract
   className?: string
   title?: string // Set if BetPanel is on a feed modal
   selected?: 'YES' | 'NO'
@@ -170,19 +170,16 @@ export function BetPanelSwitcher(props: {
           text={tradeType === 'BUY' ? title ?? 'Place a trade' : 'Sell shares'}
         />
 
-        {tradeType === 'SELL' &&
-          mechanism == 'cpmm-1' &&
-          user &&
-          sharesOutcome && (
-            <SellPanel
-              contract={contract}
-              shares={yesShares || noShares}
-              sharesOutcome={sharesOutcome}
-              user={user}
-              userBets={userBets ?? []}
-              onSellSuccess={onBetSuccess}
-            />
-          )}
+        {tradeType === 'SELL' && user && sharesOutcome && (
+          <SellPanel
+            contract={contract}
+            shares={yesShares || noShares}
+            sharesOutcome={sharesOutcome}
+            user={user}
+            userBets={userBets ?? []}
+            onSellSuccess={onBetSuccess}
+          />
+        )}
 
         {tradeType === 'BUY' && (
           <BuyPanel
@@ -200,7 +197,7 @@ export function BetPanelSwitcher(props: {
 }
 
 function BuyPanel(props: {
-  contract: BinaryContract
+  contract: CPMMBinaryContract
   user: User | null | undefined
   isLimitOrder?: boolean
   selected?: 'YES' | 'NO'
@@ -293,20 +290,12 @@ function BuyPanel(props: {
   const currentReturn = betAmount ? (currentPayout - betAmount) / betAmount : 0
   const currentReturnPercent = formatPercent(currentReturn)
 
-  const cpmmFees =
-    contract.mechanism === 'cpmm-1' &&
-    getCpmmLiquidityFee(contract, betAmount ?? 0, betChoice ?? 'YES').totalFees
+  const cpmmFees = getCpmmLiquidityFee(
+    contract,
+    betAmount ?? 0,
+    betChoice ?? 'YES'
+  ).totalFees
 
-  const dpmTooltip =
-    contract.mechanism === 'dpm-2'
-      ? `Current payout for ${formatWithCommas(shares)} / ${formatWithCommas(
-          shares +
-            contract.totalShares[betChoice ?? 'YES'] -
-            (contract.phantomShares
-              ? contract.phantomShares[betChoice ?? 'YES']
-              : 0)
-        )} ${betChoice ?? 'YES'} shares`
-      : undefined
   return (
     <>
       <YesNoSelector
@@ -355,24 +344,9 @@ function BuyPanel(props: {
         <Row className="items-center justify-between gap-2 text-sm">
           <Row className="flex-nowrap items-center gap-2 whitespace-nowrap text-gray-500">
             <div>
-              {contract.mechanism === 'dpm-2' ? (
-                <>
-                  Estimated
-                  <br /> payout if{' '}
-                  <BinaryOutcomeLabel outcome={betChoice ?? 'YES'} />
-                </>
-              ) : (
-                <>
-                  Payout if <BinaryOutcomeLabel outcome={betChoice ?? 'YES'} />
-                </>
-              )}
+              Payout if <BinaryOutcomeLabel outcome={betChoice ?? 'YES'} />
             </div>
-
-            {cpmmFees !== false && (
-              <InfoTooltip text={`Includes ${formatMoney(cpmmFees)} in fees`} />
-            )}
-
-            {dpmTooltip && <InfoTooltip text={dpmTooltip} />}
+            <InfoTooltip text={`Includes ${formatMoney(cpmmFees)} in fees`} />
           </Row>
           <div>
             <span className="mr-2 whitespace-nowrap">
diff --git a/web/components/bet-row.tsx b/web/components/bet-row.tsx
index 9621f7a9..92dd0c38 100644
--- a/web/components/bet-row.tsx
+++ b/web/components/bet-row.tsx
@@ -3,7 +3,7 @@ import clsx from 'clsx'
 
 import { BetPanelSwitcher } from './bet-panel'
 import { YesNoSelector } from './yes-no-selector'
-import { BinaryContract } from 'common/contract'
+import { CPMMBinaryContract } from 'common/contract'
 import { Modal } from './layout/modal'
 import { SellButton } from './sell-button'
 import { useUser } from 'web/hooks/use-user'
@@ -12,7 +12,7 @@ import { useSaveShares } from './use-save-shares'
 
 // Inline version of a bet panel. Opens BetPanel in a new modal.
 export default function BetRow(props: {
-  contract: BinaryContract
+  contract: CPMMBinaryContract
   className?: string
   btnClassName?: string
   betPanelClassName?: string
diff --git a/web/components/contract/contract-overview.tsx b/web/components/contract/contract-overview.tsx
index a8608ae6..617452e2 100644
--- a/web/components/contract/contract-overview.tsx
+++ b/web/components/contract/contract-overview.tsx
@@ -16,7 +16,7 @@ import { Bet } from 'common/bet'
 import { Comment } from 'common/comment'
 import BetRow from '../bet-row'
 import { AnswersGraph } from '../answers/answers-graph'
-import { Contract } from 'common/contract'
+import { Contract, CPMMBinaryContract } from 'common/contract'
 import { ContractDescription } from './contract-description'
 import { ContractDetails } from './contract-details'
 import { ShareMarket } from '../share-market'
@@ -63,7 +63,9 @@ export const ContractOverview = (props: {
           <Row className="items-center justify-between gap-4 xl:hidden">
             <BinaryResolutionOrChance contract={contract} />
 
-            {tradingAllowed(contract) && <BetRow contract={contract} />}
+            {tradingAllowed(contract) && (
+              <BetRow contract={contract as CPMMBinaryContract} />
+            )}
           </Row>
         ) : (
           outcomeType === 'FREE_RESPONSE' &&
diff --git a/web/components/feed/feed-items.tsx b/web/components/feed/feed-items.tsx
index 2a53b3a7..887279c8 100644
--- a/web/components/feed/feed-items.tsx
+++ b/web/components/feed/feed-items.tsx
@@ -35,7 +35,7 @@ import {
   TruncatedComment,
 } from 'web/components/feed/feed-comments'
 import { FeedBet, FeedBetGroup } from 'web/components/feed/feed-bets'
-import { NumericContract } from 'common/contract'
+import { CPMMBinaryContract, NumericContract } from 'common/contract'
 
 export function FeedItems(props: {
   contract: Contract
@@ -68,7 +68,10 @@ export function FeedItems(props: {
         ))}
       </div>
       {outcomeType === 'BINARY' && tradingAllowed(contract) && (
-        <BetRow contract={contract} className={clsx('mb-2', betRowClassName)} />
+        <BetRow
+          contract={contract as CPMMBinaryContract}
+          className={clsx('mb-2', betRowClassName)}
+        />
       )}
     </div>
   )
diff --git a/web/pages/[username]/[contractSlug].tsx b/web/pages/[username]/[contractSlug].tsx
index c8f3bdb6..c52bc46f 100644
--- a/web/pages/[username]/[contractSlug].tsx
+++ b/web/pages/[username]/[contractSlug].tsx
@@ -39,6 +39,7 @@ import { FeedBet } from 'web/components/feed/feed-bets'
 import { useIsIframe } from 'web/hooks/use-is-iframe'
 import ContractEmbedPage from '../embed/[username]/[contractSlug]'
 import { useBets } from 'web/hooks/use-bets'
+import { CPMMBinaryContract } from 'common/contract'
 
 export const getStaticProps = fromPropz(getStaticPropz)
 export async function getStaticPropz(props: {
@@ -142,7 +143,10 @@ export function ContractPageContent(
         (isNumeric ? (
           <NumericBetPanel className="hidden xl:flex" contract={contract} />
         ) : (
-          <BetPanel className="hidden xl:flex" contract={contract} />
+          <BetPanel
+            className="hidden xl:flex"
+            contract={contract as CPMMBinaryContract}
+          />
         ))}
       {allowResolve &&
         (isNumeric ? (
diff --git a/web/pages/embed/[username]/[contractSlug].tsx b/web/pages/embed/[username]/[contractSlug].tsx
index 98bf37b2..8581926d 100644
--- a/web/pages/embed/[username]/[contractSlug].tsx
+++ b/web/pages/embed/[username]/[contractSlug].tsx
@@ -1,5 +1,5 @@
 import { Bet } from 'common/bet'
-import { Contract } from 'common/contract'
+import { Contract, CPMMBinaryContract } from 'common/contract'
 import { DOMAIN } from 'common/envs/constants'
 import { AnswersGraph } from 'web/components/answers/answers-graph'
 import BetRow from 'web/components/bet-row'
@@ -110,9 +110,10 @@ function ContractEmbed(props: { contract: Contract; bets: Bet[] }) {
 
           {isBinary && (
             <Row className="items-center gap-4">
-              {/* this fails typechecking, but it doesn't explode because we will
-              never */}
-              <BetRow contract={contract as any} betPanelClassName="scale-75" />
+              <BetRow
+                contract={contract as CPMMBinaryContract}
+                betPanelClassName="scale-75"
+              />
               <BinaryResolutionOrChance contract={contract} />
             </Row>
           )}