SPX

On Monday I BOT 12/20 4700 calls, and sold 4700 calls expiring Monday (net cost $28) , on Wednesday ($12), and Friday ($3.5).

Since then have rolled the front expirations subsequently to Wed, Monthly (AM), and finally Friday expirations. The resulting Friday/Monday calendar currently value 8.5, net paper profit about 30%.

As long as it stays within 4650-4750 range tomorrow, there will be some further potential.