グレーブス

I’m not familiar with a Japanese stock‑market term called “グレーブス.”
It’s possible that the word is misspelled, a niche or company‑specific term, or something that isn’t widely used in the public markets.

Could you provide a bit more context or the original Japanese spelling? For example:

• Is it a ticker symbol, a company name, a type of trade, or a financial metric?
• Where did you see it (e.g., a news article, a trading platform, a company filing)?
• Is there any other related word or phrase that might help identify it?

With a little more detail I’ll be able to give you a precise explanation.