A burp is most commonly caused by eating too quickly hence swallowing air with your food, or carbonated drinks releasing gas via bubbles.
Did you market try and eat too quickly or did it swallow some bubbles?
Was that a burp or something more ominous?
~4900 remains the major decision point. VIX broke out again I have bought some March calls. If you are following along with the individual positions we at the open today will have 20% in cash.
Reduce : Half Position ISRG
: Cash BK MAR NRG WDC DPZ ANET C FIS ROL ABT