The token type is security, as unit holdings in the fund. The tokens are the equivalent of fund units, the number of tokens you hold are equal to the number of units (or you might like to call them fractions) of the fund you own. These units/token are bearer unit holdings, what this means is, simply, that if you hold them (have them in your wallet) you own them.
Countinghouse would offer a buy back to try to shrink the fund without reducing the token value. An investor might want to take their growth each month or quarter. They could do this but the number of tokens they hold would drop as they liquidated their profits.