adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-BUSINESS","nativepaywallcategory" : "NATIVE_PREM-BUSINESS"};Q: The stock market’s 2 percent drop on June 29 unnerved me. What should one do if the market crashes? — F.Y., Hattiesburg, Miss. A: The most important thing is not to panic. After all, the market recovered from that drop fairly quickly.