Reading 19 Example 5 Hedging Problems

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On the CFAI textbook 4 Session 9 Reading 19 Example 5:
Question 3 Given the data in the table, the roll yield on this hedge at the forward contracts’ maturity date is most likely to be: Correct Answer is Negative.
Solution says,
To implement the hedge, Brixworth & St. Ives must sell MXN against the GBP, or equivalently, buy GBP (the base currency in the P/B quote) against the MXN. The base currency is selling forward at a premium, and—all else equal—its price would “roll down the curve” as contract maturity approached. Having to settle the forward contract means then selling the GBP spot at a lower price. Buying high and selling low will define a negative roll yield. Moreover, the GBP has depreciated against the MXN, because the MXN/GBP spot rate declined between one month ago and now, which will also add to the negative roll yield.
(Institute 27)
Institute, CFA. 2015 CFA Level III Volume 4 Fixed Income and Equity Portfolio Management. Wiley Global Finance, 2014-07-14. VitalBook file.
The citation provided is a guideline. Please check each citation for accuracy before use.

The question is asking at “This Hedge” = “2 months MXN/GBP forward”, maturity, the roll yield is xxx.
Since we are shorting the “rolling down the curve”, shouldn’t the roll yield be positive?
 
No, the next forward to ‘rolled into’ is trading at a premium over spot due to CIRP.
The question says they’re long GBP for a hedge with the forward trading at a premium (indicating the term structure is in contango). As time goes on, this ‘premium’ value will converge with the spot rate. When expiration arrives and you’re ready to sell the expiring forward and repurchase the next forward @ T=1, you’ll be buying back the premium that was lost in the intial forward that coverged to spot.
Check out this real life example of the forward rate curve for USD/EUR
http://www.followingthetrend.com/term-structure/?ticker=CU
 
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