diff --git a/x/oracle/abci.go b/x/oracle/abci.go
index f013f9093..316838615 100644
--- a/x/oracle/abci.go
+++ b/x/oracle/abci.go
@@ -21,10 +21,17 @@ func EndBlocker(ctx sdk.Context, k Keeper) {
 	// Build valid votes counter and winner map over all validators in active set
 	validVotesCounterMap := make(map[string]int64)
 	winnerMap := make(map[string]types.Claim)
+	powerMap := make(map[string]int64)
 	k.StakingKeeper.IterateValidators(ctx, func(index int64, validator exported.ValidatorI) bool {
-		valAddr := validator.GetOperator()
-		validVotesCounterMap[valAddr.String()] = int64(0)
-		winnerMap[valAddr.String()] = types.NewClaim(0, valAddr)
+
+		// Exclude not bonded vaildator or jailed validators from tallying
+		if validator.IsBonded() && !validator.IsJailed() {
+			valAddr := validator.GetOperator()
+			validVotesCounterMap[valAddr.String()] = int64(0)
+			winnerMap[valAddr.String()] = types.NewClaim(0, valAddr)
+			powerMap[valAddr.String()] = validator.GetConsensusPower()
+		}
+
 		return false
 	})
 
@@ -55,12 +62,12 @@ func EndBlocker(ctx sdk.Context, k Keeper) {
 	for denom, ballot := range voteMap {
 
 		// If denom is not in the whitelist, or the ballot for it has failed, then skip
-		if _, exists := whitelist[denom]; !exists || !ballotIsPassing(ctx, ballot, k) {
+		if _, exists := whitelist[denom]; !exists || !ballotIsPassing(ctx, ballot, k, powerMap) {
 			continue
 		}
 
 		// Get weighted median exchange rates, and faithful respondants
-		ballotMedian, ballotWinningClaims := tally(ctx, ballot, k)
+		ballotMedian, ballotWinningClaims := tally(ctx, ballot, powerMap, params.RewardBand)
 
 		// Set the exchange rate
 		k.SetLunaExchangeRate(ctx, denom, ballotMedian)
diff --git a/x/oracle/abci_test.go b/x/oracle/abci_test.go
index 9ca789f35..edc2cb2a7 100644
--- a/x/oracle/abci_test.go
+++ b/x/oracle/abci_test.go
@@ -13,6 +13,18 @@ import (
 	"github.com/terra-project/core/x/oracle/internal/types"
 )
 
+func buildPowerMap(sk types.DummyStakingKeeper) map[string]int64 {
+	powerMap := make(map[string]int64)
+	for _, validator := range sk.Validators() {
+		if validator.IsBonded() && !validator.IsJailed() {
+			valAddr := validator.GetOperator()
+			powerMap[valAddr.String()] = validator.GetConsensusPower()
+		}
+	}
+
+	return powerMap
+}
+
 func TestOracleThreshold(t *testing.T) {
 	input, h := setup(t)
 
@@ -230,9 +242,11 @@ func TestOracleTally(t *testing.T) {
 		}
 	}
 
+	powerMap := buildPowerMap(stakingKeeper)
+
 	rewardees := []sdk.AccAddress{}
-	weightedMedian := ballot.WeightedMedian(input.Ctx, stakingKeeper)
-	standardDeviation := ballot.StandardDeviation(input.Ctx, stakingKeeper)
+	weightedMedian := ballot.WeightedMedian(input.Ctx, powerMap)
+	standardDeviation := ballot.StandardDeviation(input.Ctx, powerMap)
 	maxSpread := input.OracleKeeper.RewardBand(input.Ctx).QuoInt64(2)
 
 	if standardDeviation.GT(maxSpread) {
@@ -245,7 +259,7 @@ func TestOracleTally(t *testing.T) {
 		}
 	}
 
-	tallyMedian, ballotWinner := tally(input.Ctx, ballot, input.OracleKeeper)
+	tallyMedian, ballotWinner := tally(input.Ctx, ballot, powerMap, input.OracleKeeper.RewardBand(input.Ctx))
 
 	require.Equal(t, len(rewardees), len(ballotWinner))
 	require.Equal(t, tallyMedian.MulInt64(100).TruncateInt(), weightedMedian.MulInt64(100).TruncateInt())
diff --git a/x/oracle/internal/keeper/slashing.go b/x/oracle/internal/keeper/slashing.go
index e3cca88fe..4985b3c76 100644
--- a/x/oracle/internal/keeper/slashing.go
+++ b/x/oracle/internal/keeper/slashing.go
@@ -26,6 +26,7 @@ func (k Keeper) SlashAndResetMissCounters(ctx sdk.Context) {
 				ctx, validator.GetConsAddr(),
 				distributionHeight, validator.GetConsensusPower(), slashFraction,
 			)
+			k.StakingKeeper.Jail(ctx, validator.GetConsAddr())
 		}
 
 		k.SetMissCounter(ctx, operator, 0)
diff --git a/x/oracle/internal/keeper/slashing_test.go b/x/oracle/internal/keeper/slashing_test.go
index 7d3ce2fa7..acb0bbf7d 100644
--- a/x/oracle/internal/keeper/slashing_test.go
+++ b/x/oracle/internal/keeper/slashing_test.go
@@ -36,4 +36,5 @@ func TestSlashAndResetMissCounters(t *testing.T) {
 	input.OracleKeeper.SlashAndResetMissCounters(input.Ctx)
 	validator = input.StakingKeeper.Validator(input.Ctx, ValAddrs[0])
 	require.Equal(t, amt.Sub(slashFraction.MulInt(amt).TruncateInt()), validator.GetBondedTokens())
+	require.True(t, validator.IsJailed())
 }
diff --git a/x/oracle/internal/types/ballot.go b/x/oracle/internal/types/ballot.go
index eab318f98..fea49ad24 100644
--- a/x/oracle/internal/types/ballot.go
+++ b/x/oracle/internal/types/ballot.go
@@ -13,18 +13,18 @@ import (
 type ExchangeRateBallot []ExchangeRateVote
 
 // Power returns the total amount of voting power in the ballot
-func (pb ExchangeRateBallot) Power(ctx sdk.Context, sk StakingKeeper) int64 {
+func (pb ExchangeRateBallot) Power(ctx sdk.Context, powerMap map[string]int64) int64 {
 	totalPower := int64(0)
 	for _, vote := range pb {
-		totalPower += vote.getPower(ctx, sk)
+		totalPower += vote.getPower(ctx, powerMap)
 	}
 
 	return totalPower
 }
 
 // WeightedMedian returns the median weighted by the power of the ExchangeRateVote.
-func (pb ExchangeRateBallot) WeightedMedian(ctx sdk.Context, sk StakingKeeper) sdk.Dec {
-	totalPower := pb.Power(ctx, sk)
+func (pb ExchangeRateBallot) WeightedMedian(ctx sdk.Context, powerMap map[string]int64) sdk.Dec {
+	totalPower := pb.Power(ctx, powerMap)
 	if pb.Len() > 0 {
 		if !sort.IsSorted(pb) {
 			sort.Sort(pb)
@@ -32,7 +32,7 @@ func (pb ExchangeRateBallot) WeightedMedian(ctx sdk.Context, sk StakingKeeper) s
 
 		pivot := int64(0)
 		for _, v := range pb {
-			votePower := v.getPower(ctx, sk)
+			votePower := v.getPower(ctx, powerMap)
 
 			pivot += votePower
 			if pivot >= (totalPower / 2) {
@@ -44,12 +44,12 @@ func (pb ExchangeRateBallot) WeightedMedian(ctx sdk.Context, sk StakingKeeper) s
 }
 
 // StandardDeviation returns the standard deviation by the power of the ExchangeRateVote.
-func (pb ExchangeRateBallot) StandardDeviation(ctx sdk.Context, sk StakingKeeper) (standardDeviation sdk.Dec) {
+func (pb ExchangeRateBallot) StandardDeviation(ctx sdk.Context, powerMap map[string]int64) (standardDeviation sdk.Dec) {
 	if len(pb) == 0 {
 		return sdk.ZeroDec()
 	}
 
-	median := pb.WeightedMedian(ctx, sk)
+	median := pb.WeightedMedian(ctx, powerMap)
 
 	sum := sdk.ZeroDec()
 	for _, v := range pb {
diff --git a/x/oracle/internal/types/ballot_test.go b/x/oracle/internal/types/ballot_test.go
index f6b22abfb..e8a2552b6 100644
--- a/x/oracle/internal/types/ballot_test.go
+++ b/x/oracle/internal/types/ballot_test.go
@@ -29,6 +29,18 @@ func TestSqrt(t *testing.T) {
 	require.Equal(t, sdk.NewDecWithPrec(12, 2), num)
 }
 
+func buildPowerMap(sk DummyStakingKeeper) map[string]int64 {
+	powerMap := make(map[string]int64)
+	for _, validator := range sk.Validators() {
+		if validator.IsBonded() && !validator.IsJailed() {
+			valAddr := validator.GetOperator()
+			powerMap[valAddr.String()] = validator.GetConsensusPower()
+		}
+	}
+
+	return powerMap
+}
+
 func TestPBPower(t *testing.T) {
 
 	ctx := sdk.NewContext(nil, abci.Header{}, false, nil)
@@ -36,24 +48,26 @@ func TestPBPower(t *testing.T) {
 	pb := ExchangeRateBallot{}
 	ballotPower := int64(0)
 
+	powerMap := buildPowerMap(sk)
+
 	for i := 0; i < len(sk.Validators()); i++ {
 		vote := NewExchangeRateVote(sdk.ZeroDec(), core.MicroSDRDenom, sdk.ValAddress(valAccAddrs[i]))
 		pb = append(pb, vote)
 
-		valPower := vote.getPower(ctx, sk)
+		valPower := vote.getPower(ctx, powerMap)
 		require.NotEqual(t, int64(0), valPower)
 
 		ballotPower += valPower
 	}
 
-	require.Equal(t, ballotPower, pb.Power(ctx, sk))
+	require.Equal(t, ballotPower, pb.Power(ctx, powerMap))
 
 	// Mix in a fake validator, the total power should not have changed.
 	pubKey := secp256k1.GenPrivKey().PubKey()
 	faceValAddr := sdk.ValAddress(pubKey.Address())
 	fakeVote := NewExchangeRateVote(sdk.OneDec(), core.MicroSDRDenom, faceValAddr)
 	pb = append(pb, fakeVote)
-	require.Equal(t, ballotPower, pb.Power(ctx, sk))
+	require.Equal(t, ballotPower, pb.Power(ctx, powerMap))
 }
 
 func TestPBWeightedMedian(t *testing.T) {
@@ -111,9 +125,10 @@ func TestPBWeightedMedian(t *testing.T) {
 		}
 
 		sk := NewDummyStakingKeeper(mockValset)
+		powerMap := buildPowerMap(sk)
 
 		ctx := sdk.NewContext(nil, abci.Header{}, false, nil)
-		require.Equal(t, tc.median, pb.WeightedMedian(ctx, sk))
+		require.Equal(t, tc.median, pb.WeightedMedian(ctx, powerMap))
 	}
 }
 
@@ -172,9 +187,10 @@ func TestPBStandardDeviation(t *testing.T) {
 		}
 
 		sk := NewDummyStakingKeeper(mockValset)
+		powerMap := buildPowerMap(sk)
 
 		ctx := sdk.NewContext(nil, abci.Header{}, false, nil)
-		require.Equal(t, tc.standardDeviation, pb.StandardDeviation(ctx, sk))
+		require.Equal(t, tc.standardDeviation, pb.StandardDeviation(ctx, powerMap))
 	}
 }
 
diff --git a/x/oracle/internal/types/expected_keeper.go b/x/oracle/internal/types/expected_keeper.go
index d6602b72b..a27d45d09 100644
--- a/x/oracle/internal/types/expected_keeper.go
+++ b/x/oracle/internal/types/expected_keeper.go
@@ -11,6 +11,7 @@ type StakingKeeper interface {
 	Validator(ctx sdk.Context, address sdk.ValAddress) stakingexported.ValidatorI // get validator by operator address; nil when validator not found
 	TotalBondedTokens(sdk.Context) sdk.Int                                        // total bonded tokens within the validator set
 	Slash(sdk.Context, sdk.ConsAddress, int64, int64, sdk.Dec)                    // slash the validator and delegators of the validator, specifying offence height, offence power, and slash fraction
+	Jail(sdk.Context, sdk.ConsAddress)                                            // jail a validator
 	IterateValidators(sdk.Context, func(index int64, validator stakingexported.ValidatorI) (stop bool))
 }
 
diff --git a/x/oracle/internal/types/test_utils.go b/x/oracle/internal/types/test_utils.go
index 55b38f3ba..53dd54d62 100644
--- a/x/oracle/internal/types/test_utils.go
+++ b/x/oracle/internal/types/test_utils.go
@@ -83,6 +83,10 @@ func (DummyStakingKeeper) Slash(sdk.Context, sdk.ConsAddress, int64, int64, sdk.
 func (DummyStakingKeeper) IterateValidators(sdk.Context, func(index int64, validator exported.ValidatorI) (stop bool)) {
 }
 
+// Jail nolint
+func (DummyStakingKeeper) Jail(sdk.Context, sdk.ConsAddress) {
+}
+
 type MockValidator struct {
 	power    int64
 	operator sdk.ValAddress
diff --git a/x/oracle/internal/types/vote.go b/x/oracle/internal/types/vote.go
index ef74f0aa8..1ef32ea11 100644
--- a/x/oracle/internal/types/vote.go
+++ b/x/oracle/internal/types/vote.go
@@ -72,13 +72,12 @@ func NewExchangeRateVote(rate sdk.Dec, denom string, voter sdk.ValAddress) Excha
 	}
 }
 
-func (pv ExchangeRateVote) getPower(ctx sdk.Context, sk StakingKeeper) int64 {
-	validator := sk.Validator(ctx, pv.Voter)
-	if validator == nil {
-		return 0
+func (pv ExchangeRateVote) getPower(ctx sdk.Context, powerMap map[string]int64) int64 {
+	if power, ok := powerMap[pv.Voter.String()]; ok {
+		return power
 	}
 
-	return validator.GetConsensusPower()
+	return 0
 }
 
 // String implements fmt.Stringer interface
diff --git a/x/oracle/tally.go b/x/oracle/tally.go
index b5c787acc..b4194cfc6 100644
--- a/x/oracle/tally.go
+++ b/x/oracle/tally.go
@@ -9,14 +9,14 @@ import (
 
 // Calculates the median and returns it. Sets the set of voters to be rewarded, i.e. voted within
 // a reasonable spread from the weighted median to the store
-func tally(ctx sdk.Context, pb types.ExchangeRateBallot, k Keeper) (weightedMedian sdk.Dec, ballotWinners []types.Claim) {
+func tally(ctx sdk.Context, pb types.ExchangeRateBallot, powerMap map[string]int64, rewardBand sdk.Dec) (weightedMedian sdk.Dec, ballotWinners []types.Claim) {
 	if !sort.IsSorted(pb) {
 		sort.Sort(pb)
 	}
 
-	weightedMedian = pb.WeightedMedian(ctx, k.StakingKeeper)
-	standardDeviation := pb.StandardDeviation(ctx, k.StakingKeeper)
-	rewardSpread := k.RewardBand(ctx).QuoInt64(2)
+	weightedMedian = pb.WeightedMedian(ctx, powerMap)
+	standardDeviation := pb.StandardDeviation(ctx, powerMap)
+	rewardSpread := rewardBand.QuoInt64(2)
 
 	if standardDeviation.GT(rewardSpread) {
 		rewardSpread = standardDeviation
@@ -24,10 +24,8 @@ func tally(ctx sdk.Context, pb types.ExchangeRateBallot, k Keeper) (weightedMedi
 
 	for _, vote := range pb {
 		// If a validator is not found, then just ignore the vote
-		if validator := k.StakingKeeper.Validator(ctx, vote.Voter); validator != nil {
+		if power, ok := powerMap[vote.Voter.String()]; ok {
 			if vote.ExchangeRate.GTE(weightedMedian.Sub(rewardSpread)) && vote.ExchangeRate.LTE(weightedMedian.Add(rewardSpread)) {
-				power := validator.GetConsensusPower()
-
 				ballotWinners = append(ballotWinners, types.Claim{
 					Recipient: vote.Voter,
 					Weight:    power,
@@ -40,10 +38,10 @@ func tally(ctx sdk.Context, pb types.ExchangeRateBallot, k Keeper) (weightedMedi
 }
 
 // ballot for the asset is passing the threshold amount of voting power
-func ballotIsPassing(ctx sdk.Context, ballot types.ExchangeRateBallot, k Keeper) bool {
+func ballotIsPassing(ctx sdk.Context, ballot types.ExchangeRateBallot, k Keeper, powerMap map[string]int64) bool {
 	totalBondedPower := sdk.TokensToConsensusPower(k.StakingKeeper.TotalBondedTokens(ctx))
 	voteThreshold := k.VoteThreshold(ctx)
 	thresholdVotes := voteThreshold.MulInt64(totalBondedPower).RoundInt()
-	ballotPower := sdk.NewInt(ballot.Power(ctx, k.StakingKeeper))
+	ballotPower := sdk.NewInt(ballot.Power(ctx, powerMap))
 	return ballotPower.GTE(thresholdVotes)
 }