ok, so you have business and are worried a downturn in the stock market will hurt you. And you need 50k for a 50% drop in the market in 9 months ES is trading at about 2000 and it's $50 a point so 1 contract sold today would give you about a 50k profit if drops 50% to 1000. 60/40 futures tax split should also be considered if holding less than a year.
so a rise in the mkt will not necessarily help you but a drop will? Usually a hedge is set up so you will lose on one side but make money on the other.
then you would need most likely need an option strategy which provides you with limited upside potential and unlimited downside protection. And there are many of them and many ways to go. Good luck, I exhausted my knowledge.
So, I still think important question is, how much cash are you willing to lose to protect your situation? That will help define what you do.