This post is part of a special report, Global advisors look to China.

"SPDR S&P China (NYSE: GXC) is our favorite ETF among more speculative contrarian ideas," fund expert Mark Salzinger.

In The Investor's ETF Report, he explains, "Worries over China's economic growth in the face of global recession savaged Chinese stocks in 2008; GXC fell 48.8% from admittedly stratospheric valuations. Now, though, GXC trades at a price/earnings ratio of only 10.7.

Some of you may be sick of me writing for the third time in five days about PetroChina ADR (NYSE: PTR) -- unless you own it. But, it is on fire, so it is news. This morning as I type, PTR is up another $30 a share, passing $260. Many readers know why I invested in the company and may know that Warren Buffett did as well. His company Berkshire Hathaway (NYSE: BRK.A) ... has been selling of late, and has left a lot of money on the table.

I thought if there were any readers that would be willing to share when and why they bought PetroChina, their perspectives would be interesting. It would also be interesting if there is anyone that has been following this stock and feels they missed the boat, or on the other hand, thinks it is going to start falling for any reason. Is it time to sell or do some trimming? This post is meant to give readers a platform to discuss oil prices in general, and whether they believe energy should be excluded from the government's inflation figures.

From my perspective, I think energy should be included in the Consumer Price Index, perhaps as a rolling average, to account for volatility, but it should count. As far as PetroChina's sky-high stock price, I am skeptical when anything goes up this much without any earnings news or something about earnings.

Disclosure: I own shares of BRK.B and PTR.

To find potential opportunities and verify my track record, read Chasing Value or Serious Money.

Sheldon Liber is the CEO of a small private investment company and the principal for design and research at an architecture & planning firm.