The "Fast Money" traders share their first moves for the market open. : Inventory began to grow in the second half of last year, but supply will soon drop yet again, and could hit a new low. Johnston pointed to relatively neutral gas prices year over year as one "particularly positive" sign for consumer spending. The Mexican peso dropped against the U.S. dollar on Tuesday after Mexico's finance minister, Carlos Urzua, stepped down from his post. The Dow and S&P 500 fell for a third straight day as investors awaited more clues on the Federal Reserve's next monetary policy move.