In general, cancel 是好的影响. 有太高的credit limit available 对你以后申请其他形式的贷款由一定的负面影响. (取决于the lender or creditor you are dealing with, after seeing a good lender, he/she can restructure your credit products and giving you credit advice. credit is really personal, so I can only provide you general answers/knowledge )
加拿大信用记录:
所有的creditors 向3 大credit agencies report your credit history with them. VISA ,MASTERCARD , AMEX是三个不同的组织,正如你所说,他们向不同credit agencies report 你使用credit 的情况. 因为有这样完善和reliable的credit reporting system 才能保持和保证各个creditor 机构提供credit available. 之所以有3个credit agencies 我个人认为是为了保障信息的正确性和稳定性(legitimacy and consistency, avoid too many small and unreliable credit history sources) .保持良好的纪录,正确使用你所有的信用产品就行了.你的信用额度是跟你的net worth 和relationship 来定的. maintain 一个很好的relationship 和 一个或2个creditor是很重要的.
如果我现在一张卡的信用额度是 3万,现在要求降到5千,这样对信用记录有什么影响?如果你不怎么用这张卡就没什么影响, 但是如果你用3000左右, 那会影响你的credit utilization ratio, 会影响你的credit score eventually. 信用卡公司自动上跳你的limit 是根据你的credit utilization ratio 来的.30% 左右的credit utilization ratio 是preferred.
NOTE: Credit utilization ratio=avg usage/credit limit. 至于你以后能不能拿回3 万的额度, 那是取决于creditor. 他们可能随时降低你的额度根据current credit market condition. 我们可以观察2009, 看看credit company 会如何react to the current economic and financial condition.
credit 够用就行,而且应小心的使用. 每个人拿credit 有不同的目的. credit card 应更小心使用.每人应由一个personal line of credit for the backup of the credit card.
希望回答了你的问题..