In the nine instances since 1955 that the Fed has started raising rates after a recession, the Standard & Poor's 500 index has risen by an average of 58 percent between the first hike and the peak of the market, according to LPL Financial, an independent broker-dealer based in Boston. "Rising interest rates are usually a symptom of the success of the economy, and companies are benefiting from it," says Seth Masters, chief investment officer for Bernstein Global Wealth Management. Stocks rise when the Fed lifts rates enough to contain inflation, but not by so much that the hikes suffocate borrowing and lending. A healthier economy also means stronger corporate earnings, which drive stock prices, says Jim McDonald, chief investment strategist at Northern Trust Asset Management. Once the central bank ends its third round of quantitative easing after its next meeting that starts Oct.