HORTENSIO
Tarry, Petruchio. I must go with thee,
For in Baptista's keep my treasure is.
He hath the jewel of my life in hold,
His youngest daughter, beautiful Bianca,
And her withholds from me and other more. (1.2.118-122)
Hortensio's insistence that Bianca is a "treasure" withheld from him by Baptista echoes Petruchio's earlier claims about the importance of "wiving it wealthily" in Padua. Although Hortensio's figure of speech is not as crude as Petruchio's overt equation of wives and wealth, the metaphor treads dangerously close – especially since Hortensio accuses Baptista of hoarding his daughter. Monetary wealth may not be as important to Hortensio as it is to Petruchio, but he does equate Bianca with a commodity.
HORTENSIO
I promised we would be contributors
And bear his charging of wooing whatsoe'er.
GREMIO
And so we will, provided that he win her. (1.2.218-220)
We know that marriages are treated like business transactions between father and son-in-law. In the play, matrimony is also a thing to be negotiated among competing suitors rather than between a man and woman exclusively.