october cpi odds: 0.2% vs 0.3% Is a Coin Flip on Polymarket

The october cpi odds on Polymarket show a near coin flip on the monthly number: at our gamma pull around 06:01 UTC on November 10, "monthly inflation increases by 0.2%" traded near 44.5% Yes and "0.3%" near 43%. The Bureau of Labor Statistics releases the October report at 8:30 am ET today, so these prices have only hours left to live.

What actually happened

September's inflation report was hot, with headline CPI up 0.6% on the month, and since then markets have been leaning toward a Fed that stays tight or even hikes again. CoinDesk's preview says economists expect October to cool to 0.3% headline and 0.2% core. Last month we covered the prior print in september cpi monthly and the rate outlook in fed december hike odds.

There is one twist this time. CoinDesk notes that there will be no year-over-year comparison for October, because a government shutdown in October last year stopped the BLS from compiling a full index for that month. That matters for some markets, as we explain below.

What Polymarket thinks

The monthly market resolves on the one-month percent change in seasonally adjusted CPI-U, as published by the BLS to one decimal place. Here are the october cpi odds from our pull:

• 0.1% or less: 5.5% Yes
• 0.2%: 44.5% Yes
• 0.3%: 43.0% Yes
• 0.4%: 6.5% Yes
• 0.5%: 1.5% Yes

The order book on the 0.2% line showed a bid near 44 cents and an ask near 45 cents, so the price is fairly tight. The full monthly event had about $48K of volume, which is thin for a macro market, and only about $1.1K traded in the previous 24 hours. Most of the action sits elsewhere.

The core market leans more clearly. "Core CPI up 0.2%" traded near 54.5%, with 0.3% at 31% and 0.1% at 13%. Traders broadly agree with the consensus on core and are split on headline, which suggests they think energy or food could tip the headline number either way.

The annual market puzzle

Polymarket's "October Inflation US - Annual" market is the busiest of the group, with about $118K of volume and $31K in the last day. At our pull, "annual inflation 3.7%" traded near 92.5%. Its rules say it resolves on the 12-month change before seasonal adjustment as shown in the BLS release.

CoinDesk's note that there is no comparable October 2025 index raises a real question about how that market will settle if the BLS does not print a standard 12-month figure. We are not saying it will resolve badly; we are saying traders should read the rules and the clarifications on the market page carefully before assuming the 92.5% price is safe.

Why crypto cares

Bitcoin has been trading weak into the release. CoinDesk quotes analysts who say a soft print could spark a short relief rally, but that a lasting recovery needs spot ETF inflows to return. Bitget Wallet analysts said hotter readings "could reinforce December rate-hike expectations." A miss in either direction will show up quickly in short-dated crypto markets.

What comes after CPI

Today's report is only the first of several data points. CoinDesk lists producer prices on November 13, minutes from the Fed's October meeting on November 18 and the PCE report, the Fed's preferred inflation gauge, on November 25. A single soft or hot month can be reversed by those releases, so markets tied to the December Fed decision may keep moving long after today's print is settled.

What to do as a reader

Use the october cpi odds as a quick read of what traders expect, then check the actual numbers on the BLS CPI release page at 8:30 am ET. Remember these markets resolve on BLS figures rounded to one decimal, so 0.26% and 0.34% both print as 0.3%.

If you look at the annual market, read its rules and any updates from Polymarket on the October comparison issue. Nothing here is investment advice, and one month of data rarely settles the inflation story.