"If they are importing less, some of that is stuff from us and from Australia."
The kiwi and the Aussie dollars had already weakened ahead of the trade data as the greenback firmed slightly, he said.
Locally, investors are awaiting Friday's third-quarter inflation figures, which will provide a gauge on whether New Zealand's central bank will cut interest rates further. Traders are pricing in a 22 percent chance of a cut at this month's monetary policy review.
Speizer said it is "unlikely" the Federal Reserve will raise interest rates at the end of this month, around the same time as New Zealand's Reserve Bank will review the official cash rate, and a a US Federal Reserve interest rate rise in December was more likely.
The local currency was little changed at 4.2283 Chinese yuan from 4.2393 yuan yesterday. The kiwi traded at 91.22 Australian cents from 91.30 cents yesterday, and fell to 79.78 yen from 80.48 yen. It fell to 58.75 euro cents from 58.88 cents, and traded at 43.57 British pence from 43.68 pence.
The two-year swap rate rose 3 basis points to 2.7 percent and ten-year swaps rose about 3 basis points to 3.54 percent.