By industryThere are two tips for this. First, look at the market capitalization of the industry - that is, what share it occupies in the global economy. And allocate the same share in the portfolio to it. To avoid calculating this yourself, just look at the portfolio composition of one of the world indices. For example, Morningstar Gbl Allocation TR USD index from Morningstar analytical company is one of them. You can use it as an example to build your own portfolio.
The composition of the index can be viewed
here.
Second, we need to consider the phase of the economic cycle.
On the eve of a crisis or recession, invest more in protective industries such as health care, basic necessities and electricity. There is always a demand for medicine, food and electricity, which means that even in a crisis, companies in these sectors will continue to make money.
When the economy, on the contrary, starts to develop and grow, it is worth investing more in industry, technology and raw materials.