I was looking at my net vega today, it was over -1140. That seemed a little high to me as far as volatility exposure. So I took the opportunity today to add an SPX #Calendar for over 400 long vega to balance things out a little.
Jan: Short Jan 2560 put
Feb: Long Feb 2560 put net debit 11.60
On Calendars I always open at 1/2 size, then when price movement heads me a little more than half-way down the slope of the P/L graph, then I’ll add on the 2nd Calendar for a double, that then leaves me with a very wide profit range for the trade.