Trading volume decreases, open interest increases, and prices fall.

This combination indicates that both long and short sides have reduced their trading volume and are taking a wait-and-see approach, but the shorts remain optimistic about the future market, actively increasing their positions more than the longs. This suggests that the shorts do not have a strong confidence in a continued decline in the market, although there will be further downward movement.

However, the probability of a decline may not be as high as in the 5th combination of 'price, volume, open interest'.

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During the process of market decline, trading volume decreases, but open interest increases. The decrease in trading volume signifies that both long and short sides have a strong wait-and-see sentiment, but the increase in open interest indicates that a small number of investors remain optimistic about the future market and have chosen to enter cautiously. Among these few entering investors, the shorts slightly outnumber the longs, leading to the combination of falling prices, decreasing trading volume, and increasing open interest. Because shorts are entering the market cautiously, the overall market is still primarily downward.