ISTANBUL Gold prices continued to hit record highs on Thursday, exceeding the $5,500 level and nearing $5,600, after the US Federal Reserve held the policy rate stable and US-Iran tensions intensified. Spot gold rose over 2.4% day-on-day to $5,548.50 an ounce as of 0800GMT, after touching an all-time high of $5,595.44 earlier in the session. Prices gained about 13% over the week. Gold has surged roughly 102% over the past 12 months and about 29% since the start of the year, supported by