When I use the SV locus to calculate fst,
vcftools --vcf juglan_pfp.vcf --out each_sv_ns --weir-fst-pop north --weir-fst-pop south，
my results show a large number of negative values, but the range of fst should be [0,1],
why is this?

like this:

151 | -0.008407670
152 | 0.031399700
153 | 0.084704500
154 | -0.014872800
155 | 0.015833400
156 | -0.008638740
157 | 0.033049000
158 | 0.015833400
159 | 0.031399700
160 | 0.015833400
161 | 0.015833400
162 | -0.008638740
163 | 0.001762190

thank you!