Johannesburg - South African share prices dropped on Monday, bruised by the threat of further strikes in the country's platinum sector and a US political fight that has rattled global markets.
A regulatory review of telephone calling charges also depressed prices of mobile giants MTN and Vodacom .
The Top-40 index slid 0.6 percent to 39,050.88 and the All-share lost 0.46 percent to 43,725.70.
“The leading story today is still the US government lockdown, which is the main reason we are down,” said Evan Giannakis, an equities dealer at Imara SP Reid brokerage.
The impasse in Washington has led to a partial government shut down, raised worries of slowing US growth and increased the risk that a compromise will not be reached in time to meet the October 17 deadline on raising the debt ceiling.
Reaching a deal would avert a potential sovereign default by the world's largest economy.
Another millstone around Johannesburg's stock market was a labour union warning that a strike at Anglo American Platinum (Amplats) could spread to other major producers.
Amplats fell 1 percent while major platinum firm Lonmin was down 1.5 percent.
Vodacom and MTN were down on news regulators intend to slash fees the mobile operators charge fixed-line carrier Telkom for calls to their networks by up to 75 percent by 2016.
Vodacom, which has the largest number of South African subscribers and a market value of more than $18 billion, was down more than 6.3 percent to 116 rand.
Bigger continental rival MTN dropped 3.1 percent to 193 rand.
Telkom, on the other hand, jumped 5 percent to 26.50 rand, its highest since March 2012.
Higher spot gold prices added a sheen to Johannesburg-listed bullion producers such as Harmony and AngloGold Ashanti.
Both added more than 2 percent.
Activity was relatively slow with only 129 million shares trade, according to preliminary statistics.
The number of companies whose shares fell was 161 compared with 137 that rose. - Reuters