Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of Xinyuan Real Estate (NYSE:XIN), a residential real estate developer in China, tumbled as much as 18% following the announcement of new housing sector restrictions ready to be put in place by China's cabinet.

So what: On late Friday, China's cabinet voted for stricter implementation of the 20% capital gains tax on homes sales, increasing loan rates on buyers in cities where home prices are rising too rapidly, and other homebuyer restrictions. Previously, sellers had a choice between paying the 20% capital gains tax or between 1% and 2% the value of the home -- that appears as if it will no longer to be a choice, and it could be the impetus that dries up investment purchasing for the time being.

Now what: Up until now, Xinyuan has had no trouble selling its properties in China, but with the market for secondary homes becoming so restricted, it may see growth ebb a bit. Today's reaction seems pretty reasonable, especially given the still prevailing distrust of Chinese small-cap stocks on Wall Street. It's worth adding to your watchlist, but it's a company I'm perfectly happy observing from afar.

Craving more input? Start by adding Xinyuan Real Estate to your free and personalized Watchlist so you can keep up on the latest news with the company.