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Using Loan to Invest - Paying Monthly Installments by Selling Originally Bought Shares
The market can stay irrational longer than you can remain solvent -John Maynard Keynes The stocks could stagnate and trade in a thin range, or decline in value. You assume that your stocks will offer you ANY positive return for every month over 24 months. Just one month of negative returns puts you underwater. Thats whats wrong with it.  Even if you identified any stock that has been up every month for a consecutive 24 months in the past, there is nothing that says it will be so in the future, and a broad market selloff will effect both indexes as well as individual stocks.  Literally any adverse macroeconomic event in the next two years will put you underwater on your loan, no matter how much research you do on individual stocks.