"consistent duration biases"

CFA Level III
#1

In the Topic based practice question from CFA website,

Fixed Inc and Equity Portfolio Mgmt - Tugela

Question 6 asked “Which of the manager selection criteria described by Xulu is least likely appropriate?”

Criteria 1: The quality of the manager’s support staff.

Criteria 2: The impact of consistent duration biases on past performance.

Criteria 3: The manager’s ability to produce positive alpha in the recent past.

The answer is Criteria 3. But I do not understand what does criteria 2 mean? what’s “consistent duration biases”?

#2

It’s a stupid question.

“Criteria” is plural. The author should have written “criterion”, singular.

#3

Anyone knows what does "consistent duration biases” mean?

Thanks!

#4

When I see, it means the beta deviation from benchmark that can be considered as consistent investment style.

#5

Makes sense. Thank you!