Some mining companies are struggling to keep their assets afloat.

For instance, Silver Minerals Corp., based in San Francisco, was forced to declare bankruptcy in April after announcing it was being acquired by Rio Tinto for $9.2 billion.

Its mines in the U.S. and Europe are also struggling to cope with a surge in demand.

Silver Minerals also has a mine in Montana that’s struggling to compete with mining operations in the state.

Its shares have fallen since its IPO, with some analysts saying that the company could be in trouble.

The Silver Mineras’ troubles are not the only ones for the company.

Its stock price is down over 15% since its initial public offering, and it has struggled to make any headway in a world where mining is booming and the value of the mining stock is rising.

Goldman Sachs, the investment bank, estimates that Silver Mineral’s market cap is at $14.7 billion.

But that’s not enough for investors to see a return.

“Goldman expects Silver Miner to continue to fall as the mining market continues to recover,” the investment firm said in a research note.

Other mining companies have also fallen in value, as investors have turned away from mining.

In December, Canadian mining company Rio Tunes was acquired by French mining giant Sibanye.

Rio Tymes shares fell more than 60% since it announced its acquisition.

In August, British miner Sibwyne said it would sell its mining operations to Canadian company Vale for $1.3 billion.

And in October, U.K.-based Anglo American was acquired for $8.7 million.

But even when mining companies make progress, the stock price of mining companies can still drop.

Gold prices fell in early 2018, while coal prices have also plunged, as miners turn to alternative energy sources such as solar and wind power.

There are signs that the mining sector is beginning to rebound. 

U.S.-based energy company SolarCity said its quarterly revenue grew at a compound annual growth rate of 9.3% for the third quarter of 2018, beating Wall Street estimates of 9% growth.

In addition, the company said its third quarter profit rose 11.9% from the same period a year ago. 

SolarCity’s revenue grew 15.6% from last year. 

The solar industry has been a key driver of the U,S.

economy, helping the nation generate $18.9 trillion in GDP in 2018, according to the U