NEW YORK - The end of a market-punishing rate hiking cycle may be in sight, but uncertainty over stock valuations and the economic outlook is keeping investors on alert for more turbulence ahead. The Federal Reserve on Wednesday signaled it may pause interest rate increases after raising rates by 500 basis points over the last 14 months to fight inflation in its most aggressive monetary policy tightening since the 1980s. In theory, that should be welcome news for stocks and other so-called risk assets, which wilted under the barrage of hikes last year. Yet some investors worry this year's 6.5 percent rebound in the S&P 500 has made equities expensive. Many are also wary that th...Keep on reading: Fed’s hiking pause may not signal all-clear for US stocks