The number of buyers is still outnumbering the number of sellers. See both maps below. 

Good old Supply and Demand are still in play.   Missouri has a very high buyer market.

Buyer Demand Continues Outpacing the Supply of Homes for Sale | Keeping Current Matters

Missouri has a low # of sellers.  What is needed for the buyer market just doesn't exist. 

Buyer Demand Continues Outpacing the Supply of Homes for Sale | Keeping Current Matters

 

Rising home values will continue unless the supply of homes increases. If you're thinking of selling, now is still a good time to capitalize on the market.