$Wynn Resorts (WYNN.US)$ and$Las Vegas Sands (LVS.US)$ tum...

$Wynn Resorts (WYNN.US)$ and $Las Vegas Sands (LVS.US)$ tumbled in premarket trading, after dropping roughly 10% on Tuesday, as Macao began a 45-day period of considering tighter regulations on the gaming industry. Those U.S. casino stocks have operations in the Chinese special administrative region. Hong Kong-listed shares of Wynn Macau and Sands China tanked about 30% overnight.