OPMT Blog
Weekly One Piece TCG market analysis, set reviews and investing guides
Hot Deals, Four Months Later: Does a Long Streak on the List Mean a Better Buy?
4,702 hypothetical purchases from the daily Top 50. The list beat the rest of the market by 15 points in 30 days, but how long a card had been on it predicted nothing. What it had already done on the list did.
Read article →The One Piece TCG Market in September 2026 — Monthly Report
The index fell −6.4% in September, but the typical card fell −2.9%. OP16 stopped falling, OP17 singles slid 11% after launch week, and last month's biggest "gainers" turned out to be August's dips coming back.
Read article →Which Rarities Let You Sleep at Night? Volatility, Drawdowns and Growth by Tier
Five months of daily prices across 914 cards. SPs almost never drop 30% overnight and every drop recovered; SECs drop twice as often and stay down. What each rarity tier costs you in sleep.
Read article →What Is Actually in Each Price Bracket — and the Order the Summer Rally Moved Through Them
Price brackets are rarity ladders with a Luffy tax on every rung. Set EB02 aside and the 2026 rally has a clear order: Mangas first, then SSPs, then SPs, and alt arts last — just in time to fall.
Read article →You Are Up 50%. Can You Actually Sell? We Measured Both Halves of the Trade
Reaching a 50% gain is the easy part. We measured 160 days of prices against 280,000 detected sales to time the exit. Corrected 16 Sept: figures now exclude the one-of-a-kind EB02 set.
Read article →The One Piece TCG Market in August 2026 — Monthly Report
The tracked market moved −1.6% in August. That number hides the real story: 218 liquid cards fell for every 48 that rose, alt arts bled −7.5%, sealed went the other way, and OP17 boxes lost a third of their value before the set even released.
Read article →Should You Buy at Release, or Wait? We Tracked Two Sets From Day One
Every collector says "wait for prices to settle." We measured it. OP16 is down 29% seven weeks after release while the rest of the market rose 3%. OP15, four months in, shows where the bottom is — and which cards never come back.
Read article →The One Piece TCG Market in July 2026 — Monthly Report
After June's +16.4% surge, the tracked One Piece market cooled to +5.7% in July. June's biggest winner mean-reverted, money rotated up-set into OP13 and OP11 chase cards, and all the liquidity moved to the new OP16 set.
Read article →The Character Popularity Effect: Do Luffy Cards Really Hold Value Better?
We measured 15 weeks of prices for 3,036 cards against the official 2021 popularity poll. The more popular the character, the higher the median gain — and the smaller the chance of losing money. Luffy is in a league of his own.
Read article →The One Piece TCG Market in June 2026 — Monthly Report
Our first monthly market report: the tracked One Piece card market gained 16.4% in June. Set-by-set performance, the biggest gainers and losers, and where the liquidity actually was.
Read article →How to Spot Hot Deals? 30 Days of Data, and What Buying All of Them Would Have Returned
We analysed every card featured on OPMT Hot Deals between 7 June and 7 July 2026: the biggest gainers, the losers, and what buying all 50 featured cards every single day would have returned.
Read article →How OPMT Scores Work: LT, ST and MT Explained
A transparent look at the three scoring algorithms behind OPMT — what goes into the Long-Term, Short-Term and Medium-Term scores, at what weight, and why.
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