Cooperatives are neither left nor right. They do not fundamentally change property relations, in that they are based on private property and petite bourgeois class relations. Cooperatives can be part of early socialism, like Huawei in the PRC or the agricultural sectors in the USSR and PRC, or they can be a part of capitalist systems like Mondragon in Spain. At best, they could be considered quasi-socialist.

The reason why "fixing laws about investing" isn't really "left" is because it doesn't alter the base mode of production of society. It keeps capitalism intact, it just tweaks how you interact with it. This makes it less right wing than, say, Nazi Germany, but it doesn't make it left, either.