what does "pick-up" in yield mean?

CFA Level III
#1

I am not a native english sprachler, could anyoine please explain what “pick-up” means in the following sentences? Thanks

For the dollar-denominated portfolio, hedging the Greek bond into USD would “ pick up ” 0.625% (the opposite of hedging USD into EUR).

(Institute, 5/2018, p. 229)

Institute, C. (5/2018). 2019 CFA Program Curriculum Level III Volume 4 [VitalSource Bookshelf version]. Retrieved from https://bookshelf.vitalsource.com/books/9781946442468

and

If the manager sees the pick-up in yield for buying 15-year rather than 5-year bonds is average, but the manager forecasts a large increase in 15-year bond issuance, she may expect the spread to increase and overweight the 5-year sector now.

#2

Pick-up means to gain and take possession.

‘The old man picked up a hooker from hollywood blvd’

#3

#increase

#4

qq

#5

pick up means the difference become wider, so the manager can overweight 15-year high yield bond and underweight 5-year low yield bond.

you can see more in the 2020 CFA books 4， page 276。