Arbitrage is the oldest trade in finance: buy in one place, sell in another, pocket the difference. The gerund form turns it into an activity, which is how the people doing it actually talk about it.
It’s a term with continuous relevance and periodic bursts of intensity. Crypto revived it for a general audience, cross-exchange and cross-venue arbitrage remain real strategies, and the retail interest in the concept has never fully gone away.
The name fits a trading education platform, a data or signals product, a research publication, a community, or a fund. Education is the most durable: arbitrage is conceptually simple enough to teach and technically difficult enough that people pay to learn it properly.
One word, eleven letters, no hyphen, spelled the standard way. The .net reads perfectly well for a platform or data service, where the users arrive deliberately rather than by guessing.
The name is listed. Enquiries welcome.