US-STOCKS-Wall St rises on economy optimism, weak dollar

* U.S. dollar slips, commodities rise

* Blackstone plans to list eight companies-source

* Indexes higher: Dow 0.6 pct, S&P 500 0.3, Nasdaq 0.8

* For up-to-the-minute market news, click [STXNEWS/US]

(Updates to mid-morning)

By Edward Krudy

NEW YORK, Oct 12 (Reuters) - U.S. stocks rose on Monday as continued optimism over the economy lifted energy and other commodity prices, which were also helped by a weaker U.S. dollar.

In a possible sign of healthier capital markets, private equity firm Blackstone Group is planning to list up to eight of its portfolio companies, according to a source who received a letter the firm sent to investors on Friday. [ID:nN1295621]

Blackstone shares rose 7.6 percent.

The U.S. dollar fell 0.5 percent against a basket of major currencies <.DXY>, continuing its recent weakness that has helped bolster U.S. stocks by lifting commodity prices and increasing the dollar value of repatriated export earnings of U.S. companies.

"We are having a continuation of a commodity rally across the board," said Chad Morganlander, a portfolio manager at Stifel Nicolaus & Co in Florham Park, New Jersey. "It is tied into the dollar weakness, but if you continue to see the global economy improve even with the dollar strengthening, you will see a bid persist for commodities."

Earlier on Monday Singapore said its export oriented economy grew by more than expected in the third quarter. [ID:nSP502821]

The Dow Jones industrial average <.DJI> gained 59.10 points, or 0.60 percent, to 9,924.04. The Standard & Poor's 500 Index <.SPX> added 3.57 points, or 0.33 percent, to 1,075.06. The Nasdaq Composite Index <.IXIC> rose 16.27 points, or 0.76 percent, to 2,155.55.

Commodity and energy companies such as Newmont Mining Corp and ConocoPhillips rose more than 1 percent each.

Black & Decker Corp jumped more than 8 percent as the power tools maker raised its third-quarter earnings outlook ahead of series of blue chip earnings reports this week.

On Nasdaq, Google Inc rose 1.4 percent to $523.50 after several analysts raised their price targets on the shares ahead of Google's third-quarter results due this week.

Crude oil pushed higher above $73 a barrel, extending last week's gains, helped by growing optimism about the pace of the global economic recovery and a positive demand forecast from the International Energy Agency.

U.S. stocks rose every day last week in their best weekly run in three months, and Dow industrials reached a new 2009 closing high on Friday. The S&P 500 is up around 60 percent from March lows. (Editing by Padraic Cassidy)