Mud rune

Mud Rune is a members-only item on the OSRS Grand Exchange in the runes category.

In-game examine text: "A combined Earth and Water Rune."

It has a Grand Exchange buy limit of 18,000 every four hours, a high alchemy value of 12 gp, and item ID 4698.

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Mud Rune currently has a flip margin of −1 gp, which isn't profitable to flip right now despite 1,337,251 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.