A shopper leaves a Target store in New York, August 15, 2021. Scott Mlyn | CNBC Affirm shares jumped closed up 20{3132c872e6c78dc13c400a594a399f7f701f7fca090fe22c84668d12b33a9deb} on Wednesday after retail chain Target began offering its customers the online lender’s installment loan service for purchases of over $100. Target said in a blog post that it’s partnering with Affirm and smaller rival Sezzle as consumers gear up for the holiday shopping season. “We know our guests want easy and affordable payment options that work within their family’s budget,” says Gemma Kubat, Target’s president of financial and retail services, in the post. Buy now, pay later, or BNPL, services, which are installment loans that often come with…