diff --git a/functions/src/email-templates/market-comment.html b/functions/src/email-templates/market-comment.html
index 8a472941..84118964 100644
--- a/functions/src/email-templates/market-comment.html
+++ b/functions/src/email-templates/market-comment.html
@@ -285,7 +285,6 @@
                                 font-size: 14px;
                                 margin: 0;
                                 padding: 5px 0;
-                                font-weight: bold;
                               "
                               valign="top"
                             >
@@ -302,7 +301,10 @@
                                   "
                                   alt=""
                                 />
-                                {{commentorName}}
+                                <span style="font-weight: bold"
+                                  >{{commentorName}}</span
+                                >
+                                {{betDescription}}
                               </div>
                             </td>
                           </tr>
diff --git a/functions/src/emails.ts b/functions/src/emails.ts
index 456a92fe..221c542f 100644
--- a/functions/src/emails.ts
+++ b/functions/src/emails.ts
@@ -1,5 +1,6 @@
 import _ = require('lodash')
 import { Answer } from '../../common/answer'
+import { Bet } from '../../common/bet'
 import { getProbability } from '../../common/calculate'
 import { Comment } from '../../common/comment'
 import { Contract } from '../../common/contract'
@@ -21,7 +22,7 @@ type market_resolved_template = {
 
 const toDisplayResolution = (
   outcome: string,
-  prob: number,
+  prob?: number,
   resolutions?: { [outcome: string]: number }
 ) => {
   if (outcome === 'MKT' && resolutions) return 'MULTI'
@@ -30,7 +31,7 @@ const toDisplayResolution = (
     YES: 'YES',
     NO: 'NO',
     CANCEL: 'N/A',
-    MKT: formatPercent(prob),
+    MKT: formatPercent(prob ?? 0),
   }[outcome]
 
   return display === undefined ? `#${outcome}` : display
@@ -144,8 +145,9 @@ export const sendMarketCloseEmail = async (
 export const sendNewCommentEmail = async (
   userId: string,
   commentCreator: User,
+  contract: Contract,
   comment: Comment,
-  contract: Contract
+  bet: Bet
 ) => {
   const privateUser = await getPrivateUser(userId)
   if (
@@ -165,6 +167,11 @@ export const sendNewCommentEmail = async (
   const { name: commentorName, avatarUrl: commentorAvatarUrl } = commentCreator
   const { text } = comment
 
+  const { amount, sale, outcome } = bet
+  const betDescription = `${sale ? 'sold' : 'bought'} M$ ${Math.round(
+    amount
+  )} of ${toDisplayResolution(outcome)}`
+
   const subject = `Comment on ${question}`
   const from = `${commentorName} <info@manifold.markets>`
 
@@ -178,6 +185,7 @@ export const sendNewCommentEmail = async (
       comment: text,
       marketUrl,
       unsubscribeUrl,
+      betDescription,
     },
     { from }
   )
diff --git a/functions/src/on-create-comment.ts b/functions/src/on-create-comment.ts
index 0b2788eb..3b52dc66 100644
--- a/functions/src/on-create-comment.ts
+++ b/functions/src/on-create-comment.ts
@@ -5,6 +5,7 @@ import * as _ from 'lodash'
 import { getContract, getUser, getValues } from './utils'
 import { Comment } from '../../common/comment'
 import { sendNewCommentEmail } from './emails'
+import { Bet } from '../../common/bet'
 
 const firestore = admin.firestore()
 
@@ -23,6 +24,14 @@ export const onCreateComment = functions.firestore
     const commentCreator = await getUser(comment.userId)
     if (!commentCreator) return
 
+    const betSnapshot = await firestore
+      .collection('contracts')
+      .doc(contractId)
+      .collection('bets')
+      .doc(comment.betId)
+      .get()
+    const bet = betSnapshot.data() as Bet
+
     const comments = await getValues<Comment>(
       firestore.collection('contracts').doc(contractId).collection('comments')
     )
@@ -34,7 +43,7 @@ export const onCreateComment = functions.firestore
 
     await Promise.all(
       recipientUserIds.map((userId) =>
-        sendNewCommentEmail(userId, commentCreator, comment, contract)
+        sendNewCommentEmail(userId, commentCreator, contract, comment, bet)
       )
     )
   })