Identify the missing reagent needed to carry out the following reaction. 
Definitions:
Acceptable Investments
Financial assets or securities deemed suitable for purchase based on an investor's risk tolerance, investment strategy, and financial goals.
Payback Periods
The length of time required to recover the original investment cost through the generated returns.
Profitable
A financial state where earnings exceed expenses, resulting in a positive net income.
Discount Rate
The discount rate applied in DCF analysis to calculate the current value of future cash flows.
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