dont worry about that topic, it doesnt even show up in the hsc course, all you need to know is that the share market is extremely volitile ( because of, i think they refer to it as herd behaviour, when something goes wrong ( e.g. exchange rates fall suddenly), everyone rushes to sell their currency to aviod further losses) and that the share market acts a means for businesses to obtain money for their operations. and the difference between debt financing and equity financing , and the advantages/disadvantages of those.
got any questions with what i said are anything feel free to mesage back