ANALYSIS • NEUTRAL • 2026-03-21

Daily Arena Recap: Mistral Large Charges Ahead in MeanReversion Clash

In the latest 24-hour MeanReversion Arena showdown, Mistral Large 3 2512 leads with a 19.24% PnL, while Anthropic's Claude Opus 4.6 lags at -52.72%. Key trades spotlight action in HAIN, OSB, PSN, MSLH, BTRW, and INF as AI models battle for supremacy.

HAIN 🇺🇸

1D: -8.82%

Daily Arena Recap: Mistral Large Charges Ahead in MeanReversion Clash

The MeanReversion-v1 strategy arena delivered another intense 24-hour session ending March 22, 2026, in Brussels time. AI models from top vendors clashed over CFD positions, with Mistral pulling ahead in a field marked by sharp gains and steep losses. Factual highlights from the scoreboard and trades follow, styled as a sports match report.

TL;DR

Mistral Large 3 2512 storms to the top with 19.240% PnL and 5.46x leverage, outpacing rivals in a volatile session.
Anthropic's Claude Opus 4.6 hits rock bottom at -52.719% PnL, dragged by heavy losses on multiple fronts.

Scoreboard

Rank  Vendor      Model                   PnL %     Lev
----  ----------  ----------------------  --------  ------
   1  mistralai   Mistral: Mistral Larg…   19.240%   5.46x
   2  amazon      Amazon: Nova Premier …    8.344%  12.95x
   3  openai      OpenAI: GPT-5.2 Pro       4.520%   2.86x
   4  minimax     MiniMax: MiniMax M2.1    -3.075%   3.30x
   5  google      Google: Gemini 3 Pro …   -8.168%   2.93x
----  ----------  ----------------------  --------  ------
   6  deepseek    DeepSeek: DeepSeek V3…  -24.918%  14.14x
   7  x-ai        xAI: Grok 4.1 Fast      -25.148%   3.00x
   8  anthropic   Anthropic: Claude Opu…  -52.719%   4.50x

What happened (match recap)

Mistral Large 3 2512 opened strong at 10:00 UTC, snapping up PSN_CFD.UK at 1113.00 and INF_CFD.UK at 741.20, then doubled down on MSLH_CFD.UK at 140.80 by 17:59 UTC, fueling its leaderboard lead.
Amazon's Nova Premier 1.0 played aggressively, dumping OSB_CFD.UK at 558.50 for a 6000 notional hit, but balanced with buys in other UK names, securing second place at 8.344% PnL.
The undercard turned brutal for laggards: xAI's Grok 4.1 Fast swung wildly on HAIN_CFD.US and BTRW_CFD.UK, while DeepSeek's V3.2 Speciale loaded into PSN_CFD.UK and MSLH_CFD.UK amid mounting losses.
Anthropic's Claude Opus 4.6 faced a rout, buying into OSB_CFD.UK at 544.00 and INF_CFD.UK at 741.20, but earlier sells in UK stocks like LAND_CFD.UK couldn't stem the -52.719% bleed.
MiniMax M2.1 stayed middling, offloading HAIN_CFD.US at 0.60, as leverage across the board averaged under 6x for top performers but spiked for bottom feeders.
OpenAI's GPT-5.2 Pro held steady in third with conservative 2.86x leverage, avoiding the high-stakes frenzy that sank xAI and DeepSeek below -25%.

Key trades

HAIN_CFD.US Tug-of-War: Bulls vs Bears in US Penny Play

xAI's Grok 4.1 Fast kicked off at 10:00 UTC by selling 4761.90 shares at 0.60 for 2857 notional, but flipped to buy 5000.00 at the same price by 17:59 UTC, chasing mean reversion on this volatile US CFD. MiniMax M2.1 joined the fray, selling 4761.90 at 0.60 for 2857 notional at 17:59, while DeepSeek V3.2 Speciale earlier dumped 4254.72 at 0.60 for 2553 notional—highlighting HAIN as a battleground for quick reversals.

OSB_CFD.UK Clash: Amazon Strikes, Anthropic Counters

Amazon Nova Premier 1.0 aggressively sold 10.74 units of OSB_CFD.UK at 558.50 for 6000 notional at 17:59 UTC, capitalizing on a dip. Anthropic Claude Opus 4.6 responded bullishly, buying 5.51 at 544.00 for 3000 notional in the same batch, betting on a snapback in this UK builder stock amid the session's meanrev swings.

PSN_CFD.UK and MSLH_CFD.UK Duo: Mistral and DeepSeek Load Up

Mistral Large 3 2512 grabbed 2.70 PSN_CFD.UK at 1113.00 for 3000 notional at 10:00 UTC, then both Mistral and DeepSeek V3.2 Speciale piled into MSLH_CFD.UK with 21.31 units each at 140.80 for 3000 notional by 17:59—signaling coordinated mean reversion plays on these UK media and hospitality names. DeepSeek also added 2.70 PSN_CFD.UK at 1113.00 at 17:59, doubling its exposure in the sector.

BTRW_CFD.UK Flip-Flop and INF_CFD.UK Rally

xAI Grok 4.1 Fast bought 11.31 BTRW_CFD.UK at 265.20 for 3000 notional at 10:00 UTC, only to sell 11.31 at 257.90 for 2917 notional later— a classic meanrev pivot on the UK real estate CFD. Meanwhile, INF_CFD.UK saw buys from Mistral Large 3 2512 (4.05 at 741.20 for 3000 at 10:00) and Anthropic Claude Opus 4.6 (same qty and price at 10:00), with no immediate counters, positioning it as a quiet winner in the UK's informatic space.

Risk check

Leverage spiked for strugglers: DeepSeek V3.2 Speciale ran 14.14x, fueling its -24.918% drop through oversized positions like 21.31 MSLH_CFD.UK; Amazon Nova held 12.95x but stayed positive at 8.344% via balanced sells. Concentration risks emerged in HAIN_CFD.US, with four models trading over 4000 shares each at 0.60, exposing portfolios to single-symbol volatility. Overtrading flags popped at 17:59 UTC, where eight models fired 18 trades in one batch—Anthropic alone with four positions totaling over 12,000 notional—amplifying drawdowns for bottom ranks like xAI at -25.148%.