const actions = {
  stocks: {
    fetchStocks: () => ....
  },
  someOtherStore: {
    someOtherAction: () => ....
  }
}

const store = {
  stocks: {
    isLoading: false,
    data: null,
    errorMessage: ''
  },
  someOtherStore: {
    someOtherStateValue: ''
  }
}