I would heed you take a look below:
Whenever taking loans for buying shares, assume one and only one thing: MARKETS SHALL CRASH THE NEXT DAY FROM THE DAY YOU BOUGHT THE SHARES(from loan amount). So what's your plan of action in such a case?
I have an idea and hope that helps:
Suppose you want to buy 10 lac worth of shares based on loan.
Loan amount: 10 lac.
Loan interest: 10%
Yearly interest: 1 lac rupees.
Usually such loans are given in overdraft facility, so only the money you withdraw from your overdraft account(which bank shall create just for your loan) will be charged an interest on.
So, keeping a crash in mind and assuming crash shall be for a minimum of 3 years, you keep approximately 240,000 rupees in the overdraft account and use the rest 760,000 rupees for your investment.
What happens in this case:
1) Market crashes next day and stays there for even 3 years. Still you are able to pay the interest for 3 years without any hassles.
So, you are taken care in case of even a bear market to a good extent and I have given the bear market quite sometime: 3 years.
So, what is the ONLY THING YOU HAVE TO WATCH FOR AND REALLY WORK HARD ON?
Answer: The company you are investing into should be a really good one and should under worst of cases, give a minimum absolute return of 100% in 3 years' time.
So, do your research well on that.