The dollar took another fall on currency markets Thursday, reaching one-to-one parity against the Canadian dollar for the first time in 30 years and plumbing a new low against the euro, the 13-nation European currency.

The dramatic half-point cut in U.S. interest rates announced this week, while aimed at shoring up U.S. credit markets, also had the effect of further weakening the dollar versus other currencies by reducing the cash yield on dollars. A lower dollar can make travel more costly for U.S. residents and can also pose the risk of making imported goods more expensive over time.

The euro breached the $1.40 barrier against the dollar on Thursday. That level had long been seen as a key benchmark in terms of solidifying the euro's position on currency markets and giving it momentum toward becoming a reserve currency of choice - a position long held by the now-weakening dollar.

The 13-nation euro bought as much as $1.4064 in morning trading in Europe before falling back slightly to $1.4040, above its previous high Wednesday night of $1.3987, and more than the $1.3964 it bought in late New York trading.