BYD's shares fell by more than 8%

On Monday, BYD's Shares  fell by more than 8% in Hong Kong trade after the firm posted worse than expected first half earnings. Its net profit for the six months to June this year fell by 15.5% to $58.6m (£35.3m). It did recovered later, but only by 2.24%.

"Due to the intense competition in the automobile market and the change of subsidy policy for energy-efficient automobiles, the market share of China's local brands has shrunken by 3.48 percentage points as compared with that of last year," the firm said.

In 2009, China's car market was the largest car market of the world. However, the Chinese government is trying to reduce the competition as and manufacturer to reduce the pollution. After the removal of subsidies for traditional car purchases, in mid-2010, sales growth started to decline.

BYD's  traditional fuel cars sales fell by 27% during the six months to June from a year earlier and due to continued slowdown in traditional car sales, the company expects weak third-quarter earnings. This increases the chance for further decline in share price.

Even though there's competition between domestic and foreign car manufacturers, the company said sales of its so-called new energy vehicles had grown compared to a year earlier.

BYD's overall first half revenue rose 4% from a year earlier.

BP's share highly under performing due to Western sanctions on Russia

Sanctions against Russia is viewed as an obstacle for BP to keep it's business at normal pace. BP just posted a rise in second quarter profits. BP has around a 20% stake in Russian energy giant Rosneft and the sanctions against Russia due the Ukraine crisis can affect BP in future. BP said, "Sanctions could adversely impact our business."

BP is worried about the impact of sanctions and relationship with Rosneft. The crisis may affect the level of income, production and reserves as well as BP's investment and reputation. The company's second quarter profits is $3.2bn (£1.9bn), up from $2.4bn in the same period last year. For the second quarter, BP said higher oil production in higher-margin areas such as the Gulf of Mexico had boosted its profits. But for third quarter, the production is not expected to be high as second quarter due to the seasonal maintenance in Alaska and the Gulf of Mexico as well as the planned major turnaround.

BP has around a 20% stake in Russian energy giant Rosneft and the sanctions against Russia due the Ukraine crisis can affect BP in future.

If the sanctions become more intense, there could be prohibition of exports of technologies used in the Russian Oil sector.

BP's share price is affected along with political conflicts as BP is more exposed to political situations in Russia than any of its competitors. Analysts are seeing BP's share hugely under-performing. BP's share price had risen by 2% since early June, while Royal Dutch Shell, Exxon Mobil and Chevron had each increased by more than 9%.

On Tuesday, BP shares were up during early trading, but later fell 1.6% to 489p because of the impact on western sanctions on Russia and it's still going down.