For the first time since S&P Global Market Intelligence began tracking the data in 2006, the percentage of top executive jobs held by women in corporate America declined last year. Researchers warned the shift could represent an “alarming turning point” in the progress toward gender parity in the top jobs, the Washington Post reports. Women account for 11.8% of the 15,000 chief executives, financial officers, and other jobs at the top of publicly traded US companies. That share was 12.2% the year before, according to the report. Researchers were surprised by the turnaround, after a surge among…