North American Income Trust plc NAIT

This investment trusts invests primarily in US equities that are in the S&P 500 index. It is managed by Aberdeen Standard Investments.

5 year share price gain 31%
Dividend 3.25%.
Prior to COVID increasing its dividend by 9% (average) with very good cover. COVID years 5% excellent cover
This year 3% covered.
8% discount. Never used any of its dividend reserve since changing its remit to income equity 10years ago.

Henderson far east
5 year Share price loss 25%
Dividend 8.3%
Dividend increases around 3% a year.
Reasonable but not great dividend cover.
Premium 3%

This is an example of the rule,
not linear but accurate a lot of the time.
The higher the dividend the lower share price gain and the lower the dividend growth.