A new survey finds nearly half of foreign companies in China feel singled out by anti-monopoly and other investigations and a growing number are deciding not to expand their investments.

Wednesday's report from the American Chamber of Commerce in China comes amid a wave of probes of foreign automakers, technology suppliers and other companies. It said 57 percent of companies surveyed felt foreign firms were singled out for enforcement.

This week, Qualcomm Inc. was fined 6 billion yuan ($975 million) on charges its licensing practices for mobile phone technology violated China's anti-monopoly law.

The chamber said 31 percent of companies surveyed had no plans to expand investment in China. That was up from 27 percent in a similar survey last year and 13 percent in 2013.