* Revenue up 10 pct on derivatives
* Shares rise 2.5 percent (In U.S. dollars unless noted)
TORONTO, Aug 11 (Reuters) - Franco-Nevada Corp (FNV.TO) said on Tuesday its second-quarter profit rose 154 percent, helped by foreign exchange and derivatives gains.
The mining royalty company earned a net $25.1 million, or 25 cents a share, up from $9.9 million, or 10 cents a share, in the year-before period.
Revenue rose 10 percent to $45.1 million as lower royalty revenue was more than offset by the change in the value of derivative assets.
The lower royalty revenues were due to weaker prices for oil and gas, as well as platinum and palladium, and offset by strong gold prices.
Profit, meanwhile, was helped by an $18 million foreign exchange gain, the company said.
Shares of Franco-Nevada, which holds royalty interest in precious metal mines, base metal mines, and other projects, were up 2.5 percent at C$26.65 on the Toronto Stock Exchange.
$1=$1.10 Canadian Reporting by Cameron French; editing by Peter Galloway