{
 "hs300": {
  "vol_base": "maN",
  "ma_n": 8.0,
  "vol_shrink": 0.7,
  "shrink_win": 3.0,
  "avg_ret": 0.02300976348250467,
  "trades": 39
 },
 "zz500": {
  "vol_base": "maN",
  "ma_n": 5.0,
  "vol_shrink": 0.5,
  "shrink_win": 8.0,
  "avg_ret": 0.03236637038507643,
  "trades": 121
 },
 "zz1000": {
  "vol_base": "maN",
  "ma_n": 8.0,
  "vol_shrink": 0.5,
  "shrink_win": 3.0,
  "avg_ret": 0.02745932115030789,
  "trades": 33
 }
}