Should i disclose rates of competing lenders when shopping around

[Alex Nelson]

Hi Guys,

I just got under contract for my first duplex and am exploring my loan options. I've decided to go with a 15% down conventional loan. I'm shopping for rates and one lender has offered me a 4.5% interest loan. I was planning to go with this since it's a very low rate but i wanted to shop around to make sure that this is the best that i can find. 

My questions is, should I disclose to other lenders that I already found a 4.5% loan? Would this make the lenders more likely to compete and offer lower interest rates or does this come across as offensive to other lenders?

Any advice is appreciated!