U.S. stocks limped to the finish line to close mixed after earlier session gains were wiped out. Choppiness persisted in the markets as investors continued to pour over contagion concerns out of China related to default uncertainty of the world's most indebted property developer, Evergrande. The cautious tone was further amplified as market participants closely eyed the Fed, which began its two-day monetary policy meeting, and as a decision on raising the debt ceiling in the U.S. remained at a stalemate. Economic news was relatively subdued, as August housing construction activity came in above expectations. Meanwhile, in equity news, ConocoPhillips agreed to acquire Royal Dutch Shell's Permian business for $9.5 billion, while Lennar Corporation posted mixed quarterly results, and Dow member Disney hinted that near-term subscription growth for its streaming service, Disney+, might be choppy. Treasuries were mixed but little changed after yesterday's rise amid the global skittishness, while the U.S. dollar inched lower. Gold and crude oil prices rose. Asia finished mixed, as Hong Kong rebounded and Japan fell after yesterday's holiday, while Europe recovered after yesterday's decisive drawdown.