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Bid ask spread question from Neftci book

Joined
3/24/08
Messages
63
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In Neftci's book "Principles of Financial Engineering" on pg 37, first paragraph he writes:

"The bid-ask spread suggests that the interest is the asking rate"

I don't understand this. First of all, what exactly is the bid-ask spread here? I would think the "bid" rate would be zero: if I borrow money from a bank, my first offer to them would be to borrow money for free (at which point they'd laugh in my face and *tell* me what the rate really is). I don't really see anything here that hints at a bid-ask spread. So exactly what is he talking about here?

context:
Someone borrows $100 at time t_0 and pays back $105 at time t_1 at a rate of 5% per annum.

Thanks!
Pete
 
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