Pro Tip: “Whenever the dog pulls (the leash goes taut), immediately stop walking or turn and walk in the opposite direction. Lesson to the dog: When you pull, you’re not going anywhere, or worse, we ...
Gerd Altmann/Pixabay.com (CC0-PD) In finance, the term "collar" usually refers to a risk management strategy called a protective collar involving options contracts, and not a part of your shirt.