Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

Can a wealthy investor invest in or make a deal with a company before it goes public / IPO?
Yes, an investment can be made in a company before IPO. The valuation process is similar as that done for arriving at IPO or for a normal listed company. The difference may be the premium perceived for the idea in question. This would differ from one investor to other. For example, whether Facebook will be able to grow at the rate and generate enough revenues and win against competition is all a mathematical model based on projections. There are quite a few times the projection would go wrong, and quite a few times it would go correct. An individual investor cannot generally borrow from banks to invest into a company (listed or otherwise) (or for any other purpose) if he does not have any collateral that can be kept as security by the bank. An individual can get a loan only if he has sufficient collateral. The exceptions being small personal loans depending on one's credit history. The Private Equity placement arm of banks or firms in the business of private equity invest in start-up and most of the time make an educated guess based on their experience. More than half of their investments into start-ups end up as wiped out. An occasional one or two companies are ones that they make a windfall gain on.