"Unfortunately, many investors don't understand that if the stock rallies strongly, they won't participate in the gains, " explains Vahan Janjigian, chief investment strategist at Forbes.

FORBES: Intelligent Investing

Loeb, who has won the last five rallies and leads Gronholm by 31 points in the overall standings, admitted he struggled to cope with the Finn's pace.

BBC: SPORT | Motorsport | Rallying | Loeb frustrated as Gronholm stars

"The car is going very well and I have a good feeling, " said Loeb, who won this year's Monte Carlo and Germany rallies to reach fourth place in the championship.

BBC: Loeb seizes advantage