Technically yes but if I'm reading it right that's only because in an outdated chart they hadn't been assigned yet. Unless there's a pattern of disallowing symbols but I'd have to question the motivation behind that.

Edit: Nevermind, the rules used to create the chart are designed to disallow symbols. It gives an explanation of the rule but not the reason it was set.

  These rules identify characters commonly used in mnemonics and often
  informally described as "language characters".  In general, only code
  points assigned to this category are suitable for use in IDN.