Preinvesting-Payoff

Sch bk 4, LOS 29e, Pg 150

In pre-investing, an investor effectively borrows against the cash he will receive in the future (he invests the cash before he actually receives it).

An outright long position in futures is a fully leveraged position in the underlying as described by the following equation for pre-investing: Long underlying + Loan = Long future

I am trying to understand what is the benefit of preinvesting, is it risk free rate during the pre investing.

Also if someone can throw something light on how the pay-off could look on expiry of the future between the cash received and loss or gain (pay off) on the future.

Kindly help

If you think that stock markets gonna do weel in the next 6 moths and will you get your money after that it’s natural that you don’t wanna miss the opportunity and preinvest.