Today, I was looking at two charts of far OTM option of an index and at multiple occasions they increased at the same time.
Both had similar premium (~ 10.0)
Both were far OTM
There was 2 days left for expiry
At first, I thought there is a glitch in my data. But it happened multiple times during the day. I then verified the price with two different sources (broker terminal and date feed provider) and it was the same.
How is this possible? It was happening at the exact same time for both the strikes (call and put). DELTA was also similar (opposite).
Can anyone help me understand how that happens? I searched the net and there I got no answer to this.