Identify trends is essential for banks, as the more money they gather, the more there is to loan to the public. Understanding the trends and how they form is part of a banks highest priority. Let's see if we can predict trends for them better?
If there is a trend that is going nowhere, there is a lot of potential for that market of you can buy into it. This means that something stable or receeding will go back upon itself slowly if there is a lack of interest in it. So, when you buy something like this, you help the business and stand to make a huge profit. Don't always look for new things, if you were to buy something languishing in the doldrums, interest will spark, especially for a bank who can buy in massive amounts.
Doing this over multiple businesses or markets will leave them stronger, and the price of the shares will increase. This means that they will expand and become bigger businesses, yes? Now, if the business got bought for nothing, and ends up being a big player, the bank has sole right to that business if they bought all the shares. So...
Sell all your blue chip stock and buy up little companies, no potential needed, all the potential is there for the business. I am not talking about a brand, I am talking about raw materials and stuff like that, industry. If you were to invest in a brand though, advertise with your new injection you will be recieving. Even if you sell all the shares to make it away with the biggest haul you ever dreamed of, you will have done that business a lot of good.